Knee Pain: Causes, Symptoms, and Diagnosis - Healthline
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What causes knee pain? 27 possible conditions

Knee pain is a frequent ailment that can be experienced by people of all ages. This type of body pain may take place immediately after an injury, or it may appear as an extension of a chronic medical condition.  Read more

See a list of possible causes in order from the most common to the least.

1

Meniscus Tear of the Knee

The meniscus is a piece of cartilage that provides a cushion between your thighbone (femur) and shinbone (tibia). There are two menisci in each knee joint.

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2

Runner's Knee

Runner's knee is the common term used to describe any one of several conditions that cause pain around the kneecap. Read more about specific conditions.

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3

Anterior Cruciate Ligament (ACL) Tear

A tear in your anterior cruciate ligament (ACL) can cause pain and swelling. Learn symptoms and treatment options.

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4

Posterior Cruciate Ligament Injury

The posterior cruciate ligament (PCL) runs along the back of the knee and can be strained, sprained, or torn.

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5

Medial Collateral Ligament Injury of the Knee (MCL Tear)

An injury to the medial collateral ligament (MCL) is often called an MCL sprain. Ligament injuries can either stretch the ligament or tear it.

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6

Dislocations

This condition is considered a medical emergency. Urgent care may be required.

Since a dislocation means your bone is no longer where it should be, you should treat it as an emergency and seek medical attention as soon as possible.

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7

Sprains & Strains

Sprain refers to damage or tearing of ligaments or a joint capsule. Strain refers to damage or tearing of a muscle.

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8

Fracture

This condition is considered a medical emergency. Urgent care may be required.

A fracture is a broken bone that typically occurs when a bone is impacted by more force or pressure than it can support. In an open fracture, the ends of the broken bone tear the skin.

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9

Sports Injuries

Learn about common injuries that occur in the major regions of the body when playing sports, including concussions, neck strain, torn rotator cuffs, tennis elbow, golfer's elbow, wrist sprains, back pain, hip injuries...

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10

What is Fibromyalgia?

Fibromyalgia is a chronic disorder characterized by widespread, unexplained pain in tender points in muscles and joints, including the head, neck, and sides of hips.

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11

Tendinitis

Tendonitis causes acute pain that makes it difficult to move the affected joint. Learn about treatments.

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12

Baker's (Popliteal) Cyst

A popliteal cyst, also known as a Baker's cyst, is a fluid-filled swelling that causes a lump at the back of the knee.

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13

Ankylosing Spondylitis

Ankylosing spondylitis is a form of arthritis that primarily affects your spine. It causes severe inflammation of the vertebrae that might eventually lead to chronic pain and disability. In more advanced cases, th...

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14

Osteochondrosis

Osteochondroses are a family of disorders that affect the growth of bones in children and adolescents, when bones are still growing. The disruption of blood flow to the joints is often the cause of these disorders.

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15

What Is Osteoarthritis?

Osteoarthritis (OA) occurs when this cartilage (which provides a cushion for bones) wears away. It can occur in any joint in the body, but most commonly affects the knees, hips, spine, and hands.

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16

Arthritis

There are more than 100 different types of arthritis. Learn the basics and how your doctor might treat it.

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17

Bursitis

Bursae are fluid-filled sacs found about your joints. They surround the areas where tendons, skin, and muscle tissues meet bones. The lubrication they add helps reduce friction during movement.

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18

Gout Overview

Gout is a type of arthritis caused by too much uric acid in the blood. When the concentration of uric acid gets too high, sharp urate crystals form and collect in the joints, causing swelling and intense pain.

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19

Rheumatoid Arthritis Overview

Rheumatoid arthritis (RA) is an autoimmune disease, a disease in which the immune system mistakes the body's own cells for invaders. In RA, the immune system attacks the synovia, the membranes lining the joints.

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20

Tendon Sheath Inflammation (Tenosynovitis)

Tendons are covered by a protective sheath called synovium, which keeps tendons lubricated. Injury to this area can disrupt this function, causing inflammation.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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