Retin A disperses melanin and increases blood vessel development and cell nuitrition, decreases clogged pores and makes cells divide faster.. it doesn't cause breakouts.
Retin A shudn't be combined with other treatments and products..so please make sure of ANY treatments and topical gels u're using are safe to be used along with retin A. U're derm wud be the best person to advise u, just don't use retin a without consulting a derm.