How long is it supposed to it take acne cysts to go away on their own?

Get seen: It won't self-cure. Cystic acne is a life-ruiner for anyone who suffers from it, and it is abuse not to get it treated. A physician may make a trial of topical treatment plus a systemic antibiotic, but it will usually require a medicine such as Accutane which only a dermatologist can prescribe. Scarring from cystic acne can be brutal but can be made less conspicuous, again by a dermatologist.