You being in yours 20 s can have acne for few more years before it fades away. The hormones are still playing a role . Follow this methods Wash your face with gentle cleansers. Do not apply anything that is more oily or greasy over face. Avoid exposure to sunlight or use water based sunscreens during daytime . Avoid milk and milk derived products. Prevent Dandruff by using anti dandruff medicated shampoos. Try Antiacne preparations like Benzoyl peroxide gel at bedtime over pimples. If severe pl consult a dermatologist. Lastly I could see lot of scars on your cheeks . Your dermatologist would perform certain procedures to reduce them.