Hi Thank you for asking HCM I have gone through your query. Cause of acne is also multifactorial. It can be hormonal , diet , environmental factors , stress etc. Keep your face clean by washing twice daily with some acne soap. Over washing is also not good. Don t use much oil on head which can cause the face to be more oily. Include more anti oxidants in your diet. Green leafy vegetables , citrus fruits etc is good for this. Avoid greasy , fatty and junk foods. Excessive sugar and sweets should be avoided also. These can stimulate acne. Have good exercise daily. Jogging is good for this. Hormonal causes like PCOD if having should be managed properly as main cause of acne in some girls is due to this. You can use gels or creams with aloe vera and benzoyl peroxide for treating acne. Avoid sun exposure on face or use sunscreen. This will decrease the darkening of acne spots. Taking vitamin C and E supplements is also good. Hope this may help you. Let me know if anything not clear. Thanks.