Hello and welcome to healthcaremagic.
At 16, it is not uncommon to have acne. Acne is commonly associated with dandruff/seborrheic
dermatitis of the scalp.
If I was your treating doctor I would have asked you to use a topical antiacne gel like either
clindamycin or
benzoyl peroxide gel once or twice daily.
A topical retinoid e,g adapalene or tretinoin should be used once daily at night. It not only exfoliates existing acne but also prevents formation of new comedones/ comedogenesis.
Oral treatment for acne includes
oral antibiotics and oral retinoids. Oral antibiotics are mainly given for inflammatory acne whereas oral retinoids for the most severest of acne or acne unresponsive to traditional antiacne medications.
For dandruff, I would suggest you to use an antidandruff lotion/shampoo e.g 2%
ketoconazole shampoo, thrice weekly for 2-4 weeks followed by once or twice weekly for maintenance. It is available OTC.
If that seems insufficient then I would suggest that you see a
dermatologist. Your dermatologist might prescribe you a
topical steroid lotion, to be applied twice daily for 2 weeks.
The topical steroid lotion can be stopped once the dandruff is significantly controlled and thereafter the improvement can be sustained with just an antidandruff lotion.
I would advice that you see a dermatologist for a proper discussion regarding the best approach for your acne and dandruff
regards