Last year I had acne problem doctor given me isotorin dose for 5 month during that he given 10 to 30 mg according to my skin now I got relief from acne problem but my skin and scalp is so dry n I keep on getting flakes on my  scalp even my skin is not smooth like before some time I feel I'm getting patch on my skin and it's look like old women so can you tell me why this is happening as my doctor told me it will be fine he given me Moisturiser but still m not feeling any difference isotorin is reason for this or any other issue Let me know