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Black spots may due to post inflammatory pigmentation. Red spots may be inflammatory ance.there is no one time complete cure for acne vulgaris.It is due to hormonal; environmental ; psychological; influence .resistant acne may due to endocrinal abnormalities.treatment of underlying condition ll control acne to large exatnt.further control can be done by topical n oral therapies, chemical peeling ect; consult a dermatologist for gud control of your problem.
Answered2016-01-29 15:30:07
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