>Acne caused by excessive black heads >Simultaneously occurring blistering acne all over the face 20's >Adult acne cause be hormone imbalance >Acne caused by using a wrong cosmetic product >Acne caused by makeup products that block skin pores >Back or chest acne caused by excessive production of white heads 30's and 40's > Acne caused by excessive work, stress >Acne cused by skin dryness >Acne cause by dirt collected in large pores