I have been transplanted twice. Both times, this bald spot, which was transplanted, didn’t seem to take the grafts and grow out like the rest of the hair.
You most likely have Alopecia Areata. This condition will cause the hair to fail to grow in an active area of the disease. I recommend that you see a dermatologist. He will look at it via microscopic examination and possibly find ‘exclamation hairs’. He will also perform a biopsy to confirm the diagnosis. This is a critical step for you because this disease can get worse.