Uveitis is an inflammation of the eye. It is like arthritis, but of the eye and not the joint. It is not an infection. Most of the time, it has no underlying causes. We usually treat it with a steroid eyedrop until it is completely resolved.
However, sometimes when you stop the treatment the condition can immediately recur (especially if the inflammation had not completely resolved). Rarely, a person can get a recurrent uveitis from some underlying cause. When a uveitis recurs, we usually get blood test to look for such as lupus, rheumatoid arthritis, sarcoidosis, ankylosing spondylitis, and other autoimmune conditions.
Usually, uveitis is easy to treat (other than recurrence when you stop treatment). Some people have chronic recurrent uveitis. Then we have to worry about long term effects of uveitis and steroid treatments, such as glaucoma and cataracts.