i have three circular bald spots,notice one then another and another
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You do not mention your age or how long the bald spots have been there, so it is hard to give you specific details. Smooth circular bald spots are very common in individuals with Alopecia Areata which is an autoimmune condition. You can get circular bald spots with ringworm infections in which case the scalp is dry, scaly and flaky in the areas of hair loss. So, depending upon a variety of factors several diagnostic possibilities exist. Appropriate treatment would require making an an accurate diagnosis first.
Dr. Weaver