Hello.
Acne on chin is indicator of adult onset acne which occurs mainly due to hormonal changes.
This change are quite common in breastfeeding females.
Treatment depends on severity of condition, type of skin, type of pimples.
Next Steps
pls contact through direct online consulation so that u can share images of affected area and we can discuss in detail about your problem
Health Tips
avoid oily food sweet icecream.
avoid sunlight
don't scrap it