Joint Fluid Analysis

Test Overview

Joint fluid analysis is a test to look at joint fluid under a microscope for problems such as infection, gout, pseudogout, inflammation, or bleeding. The test can help find the cause of joint pain or swelling.

Normally, only a small amount of joint fluid is found in a joint. Joint fluid acts as a lubricant for the joint and cushions joint structures. If you have a joint problem, you may have more fluid in your joint and your joint may become swollen, stiff, and painful.

A sample of joint fluid can be taken from any joint in your body. The joint fluid is then analyzed in a lab to look for inflammation, infection, gout, pseudogout, or bleeding.