Orthopedic Conditions
58 conditionsLearn about common bone and joint conditions, symptoms, treatment options, and when to see a specialist.
Sports Med
13 conditionsACL Tear
PopularAn anterior cruciate ligament (ACL) tear is one of the most common knee injuries, particularly among athletes. The ACL is a key ligament that stabilizes the knee joint, connecting the thighbone to the shinbone. Tears typically occur during sudden stops, direction changes, or direct impact to the knee.
Learn moreMeniscus Tear
PopularA meniscus tear is a common knee injury affecting the C-shaped cartilage (meniscus) that acts as a cushion between the thighbone and shinbone. Each knee has two menisci. Tears can occur from twisting or pivoting motions during sports, or from degenerative wear in older adults. Meniscus tears are one of the most frequently treated orthopedic injuries.
Learn moreTennis Elbow
Tennis elbow (lateral epicondylitis) is a painful condition caused by overuse of the forearm muscles and tendons near the elbow. Despite its name, it is not limited to tennis players - it commonly affects anyone who performs repetitive gripping, twisting, or lifting motions. The condition involves microtears in the tendons that attach to the bony bump on the outside of the elbow.
Learn moreStress Fracture
A stress fracture is a small crack in a bone caused by repetitive force or overuse, rather than a single traumatic event. They are most common in the weight-bearing bones of the lower leg and foot. Stress fractures account for 10% of all sports injuries and are particularly common in runners, military recruits, and dancers.
Learn moreGolfer's Elbow
Golfer's elbow (medial epicondylitis) is a condition that causes pain and inflammation on the inner side of the elbow, where the forearm muscles attach to the bony bump on the inside of the elbow. Despite the name, it affects far more people than just golfers — it's common in anyone who repeatedly grips, twists, or flexes the wrist and forearm.
Learn morePatellar Tendonitis
Patellar tendonitis (jumper's knee) is inflammation of the patellar tendon — the tendon connecting the kneecap (patella) to the shinbone. It's a common overuse injury in athletes who jump frequently, such as basketball and volleyball players, but also affects runners and cyclists. Repetitive stress causes micro-tears in the tendon, leading to pain just below the kneecap.
Learn moreIT Band Syndrome
Iliotibial band syndrome (IT band syndrome) is a common overuse injury in runners and cyclists that causes pain on the outer side of the knee. The iliotibial band is a thick band of connective tissue running from the hip to the shin along the outside of the thigh. When inflamed, it causes a sharp or burning pain at the outer knee that typically occurs at a consistent point during a run.
Learn moreRunner's Knee
Runner's knee (patellofemoral pain syndrome) is a broad term for pain around or behind the kneecap, particularly during activities like running, squatting, and sitting for prolonged periods. It's one of the most common running injuries and affects people of all activity levels. The pain results from improper tracking of the kneecap (patella) in the groove at the front of the knee, leading to irritation of the cartilage underneath.
Learn moreShin Splints
Shin splints (medial tibial stress syndrome) is pain along the inner edge of the shinbone, caused by repetitive stress on the tibia and the muscles and connective tissue attached to it. It is one of the most common overuse injuries in runners, dancers, and military recruits — essentially any activity involving repetitive impact on hard surfaces. The pain is diffuse, covering a stretch of the inner shin rather than a single point, and comes on during activity.
Learn moreMCL Tear
The medial collateral ligament (MCL) runs along the inner side of the knee, connecting the thighbone to the shinbone and preventing the knee from buckling inward. MCL tears are among the most common knee injuries in contact and collision sports. They range from mild stretching (Grade 1) to a complete rupture (Grade 3), and unlike ACL tears, most heal without surgery.
Learn moreKnee Bursitis
Bursae are small fluid-filled sacs that cushion bones, tendons, and muscles around joints. The knee has around 11 bursae, and several are prone to irritation and swelling. Prepatellar bursitis (swelling directly over the kneecap) is the most common type, often from prolonged kneeling—which is why it is sometimes called "housemaid's knee" or "plumber's knee." Pes anserine bursitis affects the inner side of the knee just below the joint and is common in older adults with osteoarthritis.
Learn morePCL Tear
The posterior cruciate ligament (PCL) crosses inside the knee joint and prevents the shinbone from sliding backward relative to the thighbone. PCL tears are less common than ACL tears—accounting for about 3–20% of knee ligament injuries depending on the population studied—but they are frequently under-diagnosed because the knee may remain functional enough that patients do not realize the injury is serious. The classic mechanism is a direct blow to the front of the bent knee, as in a car dashboard injury or a football tackle.
Learn morePiriformis Syndrome
Piriformis syndrome occurs when the piriformis muscle—a small, pear-shaped muscle deep in the buttock that externally rotates the hip—compresses or irritates the sciatic nerve. The sciatic nerve in most people passes beneath the piriformis, but in roughly 10–15% of people it passes through the muscle itself, making them more susceptible. The condition is frequently misdiagnosed as lumbar disc disease because the symptoms—buttock pain radiating down the leg—look identical on the surface.
Learn moreKnee
3 conditionsOsteoarthritis
PopularOsteoarthritis (OA) is the most common form of arthritis, affecting millions of adults. It occurs when the protective cartilage that cushions the ends of bones wears down over time. While it can affect any joint, it most commonly impacts the knees, hips, hands, and spine. Osteoarthritis is the leading reason for joint replacement surgery.
Learn moreKnee Pain
Knee pain is one of the most common orthopedic complaints, affecting people of all ages. It can result from injury (ligament tears, meniscus damage), mechanical problems (loose bodies, dislocated kneecap), arthritis (osteoarthritis, rheumatoid), or overuse (runner's knee, IT band syndrome). The treatment depends entirely on the underlying cause.
Learn moreRheumatoid Arthritis
Rheumatoid arthritis (RA) is an autoimmune condition where the immune system attacks the lining of the joints, causing chronic inflammation that can destroy cartilage, bone, and surrounding soft tissue. Unlike osteoarthritis, which is driven by wear and age, RA can affect people at any age — including young adults — and typically strikes multiple joints symmetrically. The knees, hands, wrists, and feet are most commonly involved. Left untreated, RA leads to progressive joint deformity and disability.
Learn moreShoulder
6 conditionsRotator Cuff Tear
A rotator cuff tear is a common shoulder injury involving damage to one or more of the four tendons that stabilize the shoulder joint. Tears can result from acute injury (falling, lifting) or gradual wear over time (degenerative tears). Rotator cuff tears are especially common in adults over 40 and in those who perform repetitive overhead motions.
Learn moreFrozen Shoulder
Frozen shoulder (adhesive capsulitis) is a condition characterized by progressive stiffness and pain in the shoulder joint. The connective tissue surrounding the joint thickens and tightens, restricting movement. It typically develops gradually in three stages and resolves over 1-3 years, though treatment can significantly shorten the timeline.
Learn moreShoulder Impingement
Shoulder impingement occurs when the tendons of the rotator cuff and the bursa become pinched between the bones of the shoulder during overhead arm movement. It is one of the most common causes of shoulder pain, particularly in athletes and people who perform repetitive overhead activities. If left untreated, it can progress to a rotator cuff tear.
Learn moreShoulder Dislocation
A shoulder dislocation occurs when the ball of the upper arm bone (humeral head) is forced out of the shoulder socket (glenoid). The shoulder is the most mobile joint in the body and, as a result, the most frequently dislocated. About 95% of dislocations are anterior — the ball slips forward out of the socket, usually after a fall on an outstretched arm or a collision in contact sports. After a dislocation is reduced (put back in place), the risk of it happening again is high — especially in young, active patients.
Learn moreAC Joint Separation (Shoulder Separation)
A shoulder separation, formally an acromioclavicular (AC) joint separation, is an injury to the ligaments connecting the clavicle (collarbone) to the acromion (part of the shoulder blade). It is one of the most common shoulder injuries, typically caused by a direct fall on the shoulder or outstretched arm in contact sports, cycling, and skiing. The severity is graded I through VI based on which ligaments are torn and how far the clavicle displaces. Most injuries are Grade I-III and heal well without surgery.
Learn moreSLAP Tear
A SLAP tear (Superior Labrum Anterior to Posterior) is an injury to the cartilage rim—the labrum—that lines the shoulder socket. The tear occurs at the top of the socket where the biceps tendon attaches. SLAP tears are common in overhead athletes like pitchers, swimmers, and volleyball players, and also happen from a single traumatic event like a fall on an outstretched arm or a sudden pull on the shoulder.
Learn moreSpine
11 conditionsHerniated Disc
PopularA herniated disc (also called a slipped or ruptured disc) occurs when the soft center of a spinal disc pushes through a crack in the tougher exterior casing. This can irritate nearby nerves, causing pain, numbness, or weakness in an arm or leg. Herniated discs most commonly occur in the lower back (lumbar spine) but can also affect the neck (cervical spine).
Learn moreSpinal Stenosis
Spinal stenosis is a narrowing of the spaces within the spine, which can put pressure on the spinal cord and nerves. It most commonly occurs in the lumbar (lower back) and cervical (neck) regions. The condition is usually caused by age-related wear and is one of the most common reasons for spine surgery in adults over 65.
Learn moreSciatica
Sciatica refers to pain that radiates along the path of the sciatic nerve, which runs from the lower back through the hips and buttocks and down each leg. It most commonly occurs when a herniated disc, bone spur, or spinal stenosis compresses part of the nerve. While the pain can be severe, most cases resolve within 6-12 weeks with conservative treatment.
Learn moreBack Pain
Back pain is one of the most common reasons people visit a doctor, affecting approximately 80% of adults at some point in their lives. It can range from a dull, constant ache to sudden, sharp pain. While most episodes resolve within a few weeks, chronic back pain (lasting more than 3 months) affects 20% of people and may require specialist evaluation.
Learn moreDegenerative Disc Disease
Degenerative disc disease (DDD) is a condition in which the intervertebral discs of the spine break down with age or injury, leading to pain, stiffness, and sometimes nerve compression. Despite the name, it is not technically a disease but a natural aging process — though in some people it causes significant symptoms. It most commonly affects the lumbar (lower back) and cervical (neck) spine.
Learn moreCervical Radiculopathy
Cervical radiculopathy is a condition caused by compression or irritation of a nerve root in the cervical (neck) spine. When a disc herniates or bone spurs develop in the neck, they can press on the nerve roots that travel down the arm, causing pain, numbness, tingling, or weakness that radiates from the neck into the shoulder, arm, and hand.
Learn moreSacroiliac Joint Dysfunction
Sacroiliac (SI) joint dysfunction occurs when the joint connecting the sacrum (base of the spine) to the pelvis becomes inflamed, hypermobile, or stiff, causing lower back and buttock pain. The SI joint transmits all forces between the upper body and legs; when its mechanics are disrupted, the surrounding ligaments, muscles, and joint surfaces become irritated. It is estimated to account for 15-25% of all low back pain and is frequently misdiagnosed as a lumbar disc or nerve problem.
Learn moreOsteoporosis
Osteoporosis is a bone disease where density drops to the point that fractures can happen from minor falls—or in severe cases, from bending over or coughing. It affects around 10 million Americans, mostly postmenopausal women, though men develop it too. The disease is silent until a fracture happens. Hip fractures, vertebral compression fractures, and wrist fractures are the most common injuries orthopedic surgeons treat as a result.
Learn moreSpondylolisthesis
Spondylolisthesis is a condition where one vertebra slips forward over the vertebra below it. The slip disrupts the normal alignment of the spine and can compress nerves exiting the spinal canal. Severity ranges from a minimal slip (Grade I, less than 25%) to complete displacement (Grade V). The most common types are isthmic spondylolisthesis—from a stress fracture in young athletes—and degenerative spondylolisthesis—from worn facet joints in adults over 50.
Learn moreCervical Spondylosis
Cervical spondylosis is age-related wear on the cartilage, discs, and bones of the neck. By age 60, most people show some radiographic evidence of it, though many never develop symptoms. As discs lose water content and height, vertebrae can develop bone spurs that crowd the spinal canal or the openings where nerve roots exit. When these changes cause symptoms—neck pain, arm numbness, weakness—the condition is sometimes called cervical osteoarthritis or degenerative disc disease of the neck.
Learn moreKyphosis
Kyphosis is an abnormal forward rounding of the upper back (thoracic spine) that creates a hunched or curved posture. While some curvature is normal, excessive rounding (greater than 50 degrees) can cause pain, fatigue, and in severe cases breathing difficulty or neurological symptoms. It can develop from poor posture, vertebral compression fractures, degenerative disc disease, or structural abnormalities present during adolescent growth.
Learn moreHand
5 conditionsCarpal Tunnel Syndrome
PopularCarpal tunnel syndrome is a common condition caused by compression of the median nerve as it passes through the carpal tunnel in the wrist. It causes numbness, tingling, and weakness in the hand and fingers. The condition affects approximately 3-6% of adults and is more common in women, people who perform repetitive hand motions, and those with certain health conditions like diabetes.
Learn moreTrigger Finger
Trigger finger (stenosing tenosynovitis) is a condition where one of the fingers gets stuck in a bent position and then snaps straight, like a trigger being pulled and released. It occurs when inflammation narrows the space within the tendon sheath surrounding the finger's flexor tendon, making smooth tendon gliding difficult. It can affect any finger and may affect multiple fingers simultaneously.
Learn moreWrist Fracture
A wrist fracture most often refers to a distal radius fracture — a break at the lower end of the radius bone, just above the wrist joint. It is one of the most common fractures in all of medicine, typically occurring when someone falls on an outstretched hand. About 640,000 distal radius fractures are treated in the US annually. They range from mild, minimally displaced breaks that heal well in a cast, to complex, unstable fractures requiring surgery to restore alignment and function.
Learn moreDe Quervain's Tenosynovitis
De Quervain's tenosynovitis is inflammation of the tendons on the thumb side of the wrist (the abductor pollicis longus and extensor pollicis brevis) where they pass through a tight fibrous tunnel at the base of the thumb. When inflamed, the tendons can no longer glide smoothly through the sheath and every thumb movement becomes painful. It is one of the most common causes of wrist pain, affecting women far more often than men, particularly new mothers and anyone with repetitive pinching or gripping work.
Learn moreDupuytren's Contracture
Dupuytren's contracture is a progressive fibrotic condition of the palm in which abnormal collagen builds up in the fascia—the connective tissue layer beneath the skin—forming thick cords that pull one or more fingers into a bent position. The ring and little fingers are most commonly affected. It tends to develop slowly over years, and many people do not notice it until a finger begins to resist straightening. The condition is more common in men, people of Northern European descent, and those with a family history; it is also associated with diabetes, smoking, and alcohol use.
Learn moreFoot & Ankle
9 conditionsPlantar Fasciitis
Plantar fasciitis is one of the most common causes of heel pain. It involves inflammation of the plantar fascia, a thick band of tissue that connects the heel bone to the toes and supports the arch of the foot. The condition causes stabbing pain that is usually worst with the first steps in the morning. It is common in runners, overweight individuals, and people who wear shoes with inadequate support.
Learn moreAnkle Sprain
An ankle sprain occurs when the ligaments that support the ankle are stretched or torn, usually from the foot twisting or rolling inward. It is one of the most common musculoskeletal injuries, affecting an estimated 2 million people annually in the US. While most sprains heal with conservative treatment, severe or repeated sprains can lead to chronic ankle instability.
Learn moreBunions
A bunion (hallux valgus) is a bony bump that forms on the joint at the base of the big toe. It develops when the big toe pushes against the next toe, forcing the joint to stick out. Bunions can cause significant pain and make it difficult to find comfortable shoes. They affect approximately 23% of adults and are more common in women.
Learn moreAchilles Tendinitis
Achilles tendinitis is inflammation of the Achilles tendon — the large tendon connecting the calf muscles to the heel bone. It's one of the most common overuse injuries, particularly in runners and middle-aged athletes who have increased their activity level. There are two types: insertional (at the heel bone attachment) and non-insertional (in the middle portion of the tendon).
Learn moreMorton's Neuroma
Morton's neuroma is a thickening of the tissue around a nerve leading to the toes, most often between the third and fourth metatarsals. Despite the name, it is not a tumor. It is benign fibrous tissue that builds up around the digital nerve in response to chronic compression. The result is burning or sharp pain in the ball of the foot. Women are affected more often than men, particularly those who regularly wear tight, narrow, or high-heeled shoes.
Learn moreHammer Toe
A hammer toe is a progressive toe deformity where one of the lesser toes (most commonly the second, third, or fourth) develops an abnormal downward bend at the middle joint, creating a claw-like appearance. It develops from muscle and tendon imbalance, often worsened by tight or narrow footwear that holds the toe in a bent position for hours daily. In early stages the deformity is flexible and responds well to conservative treatment. Over time the toe becomes rigid and surgery is needed to straighten it.
Learn moreHallux Rigidus
Hallux rigidus is arthritis of the big toe joint—specifically the metatarsophalangeal (MTP) joint at the base of the great toe. It is the most common arthritic condition of the foot, affecting roughly 1 in 40 adults over 50. The cartilage covering the joint surfaces wears away, bone spurs (osteophytes) develop around the joint, and motion becomes progressively restricted and painful. "Hallux rigidus" means literally stiff big toe—and the progressive loss of dorsiflexion (the ability to bend the toe upward) is what drives most of the functional limitations.
Learn moreTarsal Tunnel Syndrome
Tarsal tunnel syndrome is compression of the posterior tibial nerve as it passes through the tarsal tunnel—a narrow passage on the inner side of the ankle beneath the flexor retinaculum (a fibrous band of tissue). The nerve and its branches supply sensation to the bottom of the foot and motor function to some intrinsic foot muscles. The condition is sometimes called the foot equivalent of carpal tunnel syndrome, though it is far less common and can be caused by a wider variety of compressive lesions including varicose veins, ganglion cysts, bone spurs, tendon sheath swelling, or flat foot deformity that narrows the tunnel.
Learn moreLisfranc Injury
A Lisfranc injury is damage to the bones or ligaments at the Lisfranc joint complex — where the metatarsal bones of the forefoot meet the tarsal bones of the midfoot. These injuries range from mild ligament sprains to severe fracture-dislocations and are frequently misdiagnosed as simple foot sprains. Lisfranc injuries occur in athletes from low-energy twisting mechanisms and in non-athletes from falls or direct trauma such as a heavy object dropping on the foot.
Learn morePediatric
2 conditionsScoliosis
Scoliosis is a sideways curvature of the spine that most often occurs during the growth spurt just before puberty. While most cases are mild, some curves worsen as children grow. Severe scoliosis can reduce chest space and limit lung function. The condition affects approximately 2-3% of adolescents, with girls more likely to require treatment than boys.
Learn moreOsgood-Schlatter Disease
Osgood-Schlatter disease is a common cause of knee pain in growing adolescents, typically affecting those between 9 and 14 years old who are active in running and jumping sports. It is not actually a disease but an overuse injury: repeated stress at the point where the patellar tendon attaches to the tibial tuberosity (a bony prominence just below the kneecap) causes inflammation and micro-injury at the growth plate. In severe or prolonged cases, a separate ossicle (bone fragment) can form at the attachment site. It usually resolves on its own once growth plates close, but can be painful enough to limit sports participation for months.
Learn moreHip
5 conditionsHip Bursitis
Hip bursitis (trochanteric bursitis) is inflammation of the bursa - a fluid-filled sac that cushions the bony point of the hip (greater trochanter). It causes pain on the outside of the hip that can radiate down the thigh. It is one of the most common causes of hip pain, affecting approximately 15% of women and 8% of men.
Learn moreHip Labral Tear
A hip labral tear is damage to the ring of cartilage (labrum) that lines the rim of the hip socket. The labrum acts as a seal, keeping the ball of the thigh bone firmly within the hip socket. Labral tears are increasingly recognized in active adults and athletes, particularly those involved in sports requiring repetitive hip rotation — but can also occur from structural abnormalities like femoroacetabular impingement (FAI).
Learn moreHip Fracture
A hip fracture is a break in the upper quarter of the femur (thigh bone), near the hip joint. Hip fractures are a serious injury, particularly in older adults — more than 300,000 Americans are hospitalized for hip fractures each year. They are most commonly caused by falls in people with osteoporosis, though high-energy trauma can cause hip fractures in younger patients as well.
Learn moreAvascular Necrosis
Avascular necrosis (AVN), also called osteonecrosis, is the death of bone tissue due to loss of blood supply. Without adequate blood flow, the bone cells die and the bone structure collapses over time. The femoral head — the ball of the hip joint — is the most commonly affected site, but the knee, shoulder, and ankle can also be involved. AVN ranges from early-stage disease with no collapse (often manageable with joint-preserving procedures) to late-stage collapse requiring joint replacement.
Learn moreFemoroacetabular Impingement (FAI)
Femoroacetabular impingement (FAI) is a condition where abnormal bone growth on the femoral head (cam impingement), the acetabular rim (pincer impingement), or both causes friction inside the hip joint during movement. The extra bone grinds against the labrum and cartilage, progressively damaging the joint. It is one of the most common causes of hip pain in active young and middle-aged adults, and a leading reason for early-onset hip arthritis if untreated.
Learn moreGeneral
4 conditionsAchilles Tendon Rupture
A complete Achilles tendon rupture is one of the most dramatic sports injuries—the tendon connecting your calf muscles to the heel bone tears through entirely, usually with a loud pop and sudden loss of push-off strength. It most often happens during explosive movements: sprinting, jumping, or pushing off hard in racquet sports. The classic patient is the 30- to 50-year-old "weekend warrior" whose tendon was already weakened by degeneration.
Learn moreCubital Tunnel Syndrome
Cubital tunnel syndrome is compression of the ulnar nerve at the elbow—the same nerve responsible for your "funny bone" sensation. It is the second most common nerve compression in the arm after carpal tunnel syndrome. The ulnar nerve passes through a tight channel on the inside of the elbow, and pressure or stretching—often from prolonged elbow bending—causes numbness, tingling, and weakness in the ring and small fingers.
Learn moreGout
Gout is a form of inflammatory arthritis caused by a buildup of uric acid crystals in joints. When uric acid levels get high enough, crystals deposit in the joint space and trigger an intense inflammatory response. The big toe joint is affected in roughly 50% of cases, but gout can hit any joint—ankle, knee, wrist, or elbow. Attacks typically come on suddenly, peak within 24 hours, and can be severely debilitating. Untreated gout leads to recurrent attacks, joint damage, and tophi (hard crystal deposits under the skin).
Learn moreGanglion Cyst
Ganglion cysts are the most common benign soft tissue masses in the hand and wrist. They are fluid-filled sacs that arise from joint capsules or tendon sheaths, forming a smooth, round lump just under the skin. The back of the wrist accounts for about 60–70% of cases. They can also appear on the palm side of the wrist, at the base of fingers, or on the foot. Their size fluctuates—some swell with activity and shrink with rest.
Learn moreFind the best orthopedic surgeons near you
Not sure what you have?
Search by symptom
Describe what's bothering you and we'll help you find the right specialist.
Search ConditionsHave a diagnosis?
Find a specialist
Browse 27,000+ board-certified orthopedic surgeons by specialty or location.
Browse Specialists