@audrey8,
Synovial fluid is something that acts as a lubricant in the joint. When this fluid gets thickened it causes the chronic inflammation there by causing the cartilage damage as a result this allows the bone to rub with each other and cause pain and stiffness. Rheumatoid Arthritis are of different types affecting different organs of the body. The following are the types:
1. Juvenile Rheumatoid arthritis
2. Pseudogout Arthritis
3. Lupus Arthritis
4. Infectious Arthritis
5. Hemorrhagic arthritis
6. Ankylosing Spondylitis
Rheumatoid arthritis is an autoimmune disorder mainly involving the swelling, pain, inflammation and stiffness of the joints, knees. It is more commonly found in women than men.
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