What can i use that will get rid of the pimples on my back and the dark spots from acne on my back? im light complected & the dark marks show up pretty well & i don't wear tank tops because of that

Retin A (tretinoin): Retin a (tretinoin) is a prescription. The generic, tretoin, is the same but costs less. Tretinoin gel should be obtained in the largest size. Apply a very small amount every night. At first it may be irritating & drying, so you may skip a night sometimes. It is less irritating if you wait 20 minutes after washing. Expect improvement after 3 months, then continue for at least a year. Frustrating, but it tak.

Retin A (tretinoin): Retin a- generic is tretinoin is irritating the first 1-2 weeks, but will help you after 3 months. You will want to continue at least a year, apply a small drop of tretinoin gel every night on dry skin. If your acne is painful, red, cystic, nodular, or pustular your dr will also prescribe a pill such as Doxycycline or spironolactone or a birth control pill.