hi na , masturbate cant cause acne. as you know, in puberty there is increasing of testosteron level. testosteron as androgenic hormone can cause acne, but masturbate has no related with acne because testosteron level increased due to puberty periode it doesnt matter you do masturbate or not. to avoid acne these are what you can do : 1. avoid stress 2. keep your face clean ,wash your face with good mild cleansing soap with warm water twice a dayto remove deadskin or excess oil in surface skin especialy before go tobed. dont washing your face to frequently with cleansing soap,it may dry your skin and stimulate your skin produce more oil. 3. wash your hair to avoid oil in your hair rub in your skin 4.drink a lot of water about 2 lt (8 glass of water) aday to hidrate your skin 5. avoid eating greasy food, junk food, alkohol,soda,chips,chocolate and eat more fresh vegetables or fruit that rich with vitamine A and C such as carrot,kiwi,grapefruit,broccoli, orange. 6. moistuized your skin with good skin moisturiser to avoid more oilly skin 7.avoid sun rays to much,use good sun block 8. if you are using cosmetic (for female) avoid overuse or try using cosmetic that not oily based 9. dont use medication that can cause acne such as birth control medication 10.avoid share towel with your friends or sibling that have acne,that may cause acne bacteria spread to your skin i dont know what kind of drugs you already tried, but wrong treatment may cause your acne worst and can cause scars. if you see your acne is annoying you, i suggest you better consult with dermatologist for acne treatment.dermatologist will give medication based on your condition. well na, i hope this answer can help you solve your problem.