Acne pimples

Patient: At what age does acne comes at adult and when it get vanished from face and body?Which medicine should i use to control my acne pimples?Will i have to take exercise everyday?Which edible thing should i not take and what should be taken more?Should i check my blood for my acne pimples?Which kind doctor should i console for it? Homopathic or other.Please suggest me some medicine i should buy for my acne for best result.