Humans are complex machines. Most of the time, all the parts work correctly, with various gears and components clicking in harmony.

The CDC defines arthritis as joint inflammation or swelling. It describes more than 100 joint and connective tissue conditions.

Rheumatoid arthritis can develop at any age, but usually affects middle-aged women. Rheumatoid arthritis symptoms include:

– Fever. – Fatigue. – Joint stiffness and pain in the morning that loosens up as you move more. – Numbness or tingling in the extremities. – Decreased range of motion. – Joint deformity.

Rheumatoid arthritis can develop in children and adults between 30 and 50. Juvenile rheumatoid arthritis is one type of childhood arthritis.

The symptoms of juvenile rheumatoid arthritis are similar to those in adults: – Swollen, painful or stiff joints, especially upon first waking. – Fever and rash. – Swollen lymph nodes. – Fatigue. – Eye redness or irritation. – Warmth or redness in one or more joints.

Complications RA affects the joints, but it can also affect other body parts and increase your risk of developing heart disease, high blood pressure, and diabetes.

Genetics, environmental factors, and hormones may all contribute to RA, according to the NIH. Risk factors include sex, age, and lifestyle.