Pimple On Chin Won't Go Away. Once you do get to see your derm a few things may happen. For some people they dont go away for years.

How to Heal a Big Pimple That Wont Go Away Resist the Urge to Pop It. Just place a pad on the pimple and watch it fade away. Salicylic acid acts as an exfoliant cleansing your pores and clogged follicles of excess sebum while calming down irritation.
If your pimple just wont go anywhere theres a decent chance its not a pimple at all and treating a non-pimple with acne medications likely wont do you any good.
Use a warm compress. Acne on the chin and acne on the jaw usually presents itself as deep and cystic. However there are times that you are sure the bumps are not acne or pimples and remain there for months. If you use topical acne treatments continue to do so.