This tretinoin gel is used to prevent and treat pimples. It also reduces the occurrence of new pimples. Tretinoin cream 0.1(A-Ret 0.1% Gel) is a form of a cream, liquid or gel.    Uses of A Ret Gel A Ret Gel Is used to prevent and treat pimples. Acne is a skin condition that occurs when your hair follicles become plugged with oil and dead skin cells causing blackheads, whiteheads, or...