What will cause synovitis?

Many things. Overuse, injury, degenerative arthritis or inflammatory arthritis like rheumatoid arthritis. If the inflamation persists see a physician for a work up.
Several things. Synovitis is inflammation of joint which can be related to trauma, infection, rheumatoid disease, gout, etc. Fluid in joint can be part of disease process.

Related Questions

What can cause synovitis?

Many things. Overuse, injury, degenerative arthritis or inflammatory arthritis like rheumatoid arthritis. If the inflamation persists see a physician for a work up. Read more...