Acne are very common in teenagers and with medicines, diet and lifestyle modifications are mandatory.
From oral, topical antibiotics to topical peels with other measures are various treatments.
In my experience only medicines will not help you, because scars need invasive treatment and between acne and scars acne need to treated first.
Next Steps
Visit a dermatologist
Health Tips
Stop oily food, dairy products, having three liters water minimally and low on carbs diet.