Greetings. Please note : Acne is a common problem at your age. Milk and bakery products, junk food -  excessive consumption of these can worsen acne. Reduce intake of chocolates too. Use a topical retinoid cream daily night. You may need a short course of antibiotics. Discuss other suitable forms of treatment with your dermatologist. Hope this helps. Warm regards. Further queries may be sent on follow up messaging.