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Usually people get confused between fine hair growth with the black head over nose.So kindly get it either examined by a dermatologist or look closely for the fine hair growth.
If its a black head then you can use tretinoin
cream at night over the lesion .Don't forget to use a good sunscreen in the day time .Tretinoin cream has a peeling action and would peel off the skin along with the black heads.I would suggest you to consult a dermatologist
at any government set up .