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What causes joint swelling? 28 possible conditions

Joints are the structures that connect two or more bones in your body. They’re found in your feet, ankles, knees, hips, arms, and many other parts of your body. Joints are surrounded and cushioned by soft tissues. Swelling occurs when fluid accumulates in... Read more

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

1

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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2

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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3

Fracture

A fracture is a broken bone. Learn about the risk factors, symptoms, and treatments for different types of fracture.

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4

Arthritis

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

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5

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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6

Rheumatoid Arthritis Overview

Rheumatoid arthritis is an autoimmune disease. It causes joint problems. In autoimmune diseases, the immune system mistakes the body's own cells for invaders.

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7

Infectious (Septic) Arthritis

Infectious arthritis occurs when an infection, caused by a bacteria or virus, spreads to a joint or the fluid surrounding the joint (synovial fluid).

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8

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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9

Systemic Lupus Erythematosus

Systemic lupus erythematosus, the most common form of lupus, is a chronic autoimmune disease that can cause severe fatigue and joint pain. Learn more about it.

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10

Sjogren's Syndrome

Sjögren's syndrome is an autoimmune disorder that primarily affects salivary and lacrimal glands. Read about signs and symptoms.

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11

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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12

Lyme Disease

Lyme disease is an infectious condition transmitted via tick bite. A "bull's eye" rash at the site of the bite is an early symptom of this disease.

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13

Acromegaly

Acromegaly is a rare hormonal condition caused by an excess amount of growth hormone in the body. It leads to excessive growth.

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14

Hemophilia A

Hemophilia A is the most common form of the blood clotting disorder hemophilia. According to the National Heart, Lung and Blood Institute, nine out of 10 people with hemophilia have hemophilia A (<...

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15

Psoriatic Arthritis

Psoriatic arthritis (PsA) is a type of arthritis that occurs in people with psoriasis. Psoriasis is a skin disease where itchy, scaly red patches appear on the skin and scalp. According to The National Psoriasi...

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16

Juvenile Rheumatoid Arthritis

Juvenile rheumatoid arthritis is the most common type of arthritis in children. Learn about juvenile rheumatoid arthritis symptoms, diagnosis, and treatment.

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17

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.

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18

Rheumatic Fever

Rheumatic fever is a complication of strep throat. If it's left untreated, it can cause permanent damage to your heart. Find out about symptoms and treatment.

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19

Tennis Elbow

Tennis elbow often occurs when a specific muscle in the forearm, the extensor carpi radialis brevis (ECRB) muscle, is damaged. The ECRB helps raise the wrist.

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20

Sarcoidosis

Learn about sarcoidosis and its causes, symptoms, diagnosis, treatment, and potential complications.

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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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