Acne vulgaris is physiological reponse to hormonal variations, it depends on the heriditory how we respond or there may be abnormal source of hormonal variations like PCOD..etc.. So its not a one time treatment you need to maintain ...there are teenage acne or adult acne (usually after 20 years may be due to hormonal vaiations). Acne vulagaris some times need to be differentiated with Rosacea which also looks similar to acne but its different. If its acne which is resistant to treatment Means systemic isotretinoin(after investigation) works in all grades of acne. Chemical peeling with salicylic acid.etc, Light therapy (ipl).. along with the topical application ,systemic antibiotics..etc. . Now you can use clindac A foamy face wash zinderm BN gel topical application on acne. Cap.minoz ER 65 daily night for 4 weeks. Episoft Ac spf 30 cream daily morning  cream. If its not coming down meet nearby Dermatologist.

Find out the cause for acne like irregular menstruation , dandruff,oily skin ,diet ,use of cosmetics If acne lesions are stopped then can go for chemical peeling  after consulting cosmetologist or dermatologist