Closed acne is actually whitehead acne, and topical medication is the main treatment. You can choose retinoids such as adapalene gel, retinoic acid ointment, tazarotene gel, etc. and apply them once a day at night. Be sure to apply them point to point on top of the acne and try not to apply them to normal skin, because these drugs can be dry, peeling, and even irritating and red when used. In addition to creams, you can also use needle clearing, fruit acids or salicylic acid with the treatment.