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From the description it could be a condition called alopecia areata
. This is an immune mediated disease characterized by patchy non scarring hair loss. Without an opportunity to closely examine the lesion, I would not be able to accurately specify the condition. You might need to consider a consultation with dermatologist
for diagnosis and treatment.
I usually treat a single patch of alopecia areata with intralesional steroid
injection once in three weeks along with local application of minoxidil
Hope this helped