The main component of retinoic acid ointment is a derivative of vitamin A, vitamin A acid. This substance has a significant antikeratotic and keratin-softening effect, as well as a certain anti-inflammatory effect, so this kind of drug is still widely used in dermatology. It can be used in general for acne on the face, especially acne vulgaris, and has a certain softening of keratin as well as an anti-inflammatory effect. In addition, it has a soothing and receding effect on periorbital keratosis, such as keratotic papules with follicular consistency on the cheek area and the outer part of both upper limbs. It also has a softening and dissolving effect on other keratotic skin diseases, such as lichen planus or neurodermatitis, which are chronic skin diseases with significant keratinization.