Why is My Hair Loss from Alopecia Areata Cyclical?

(female) About 1 year ago, I found out I had Alopecia Areata. I went to the doctor right away and got the steroid injections to the bald spot I had. Well, in about 5 month, i got all my hair back, but it starting thinning out. Now after full 10 months, I noticed a very small bald spot on my scalp again. So, my question is why am I loosing hair after almost 1 year again. Please suggest something.

Alopecia areata is an autoimmune disease and based upon your history, it sounds like it is active. It has been known to return after disappearing spontaneously or with treatment. Read up about the disease at the National Alopecia Areata Foundation site.