Any advice for acne. im 17 and had it for about 4 years. its a lot better now but i still have it on my chest, face and back. i've took antibiotics.

Go see your doctor: There are many options for treating acne, starting w/over-the-counter topicals such as benzoyl peroxide to systemic antibiotics to more intensive vitamin a derivatives and other options. If you have cystic pustular acne, you might consider Isotretinoin which can cause birth defects if taken by pregnant women. Check out http://www.Mayoclinic.Com/health/acne/ds00169. Then talk to your doc about you.