How do i know if i have rheumatoid arthritis or osteo arthritis?

See your PCP: Typically you'll need to see a doctor who will make that determination based mostly on a history and physical examination. Depending on the situation, x-rays and some lab work may help as well. In difficult situations, your primary care doctor may refer you to a specialist like an orthopedic surgeon or rheumatologist.

Exam / Blood: Ra affected joints have more swelling than oa due to synovitis. An exam and blood work can help differentiate.