What causes acne and scars on chin?

Imperfect healing: Acne pimples occur when the immune system detects the clump (comedone) of skin cells blocking a pore, trapping oils inside the skin, and also trapping some bacteria. The bacteria and oils leak into the skin, causing a reaction in which the immune system sends white blood cells in to push all of the stuff out of the body. After the pimple ruptures, it heals but imperfectly, leaving little scars.

Many causes: Affecting the sebaceous glands that may be associated with the sebaceous glands of the chin skin and associated hair follicles. Acne disease has many causes ranging from diet sensitive, to stress related, and hormone responsive. It amy take to determine the best medication and skin care regimen for your particular problem so be patient.