A hard bump on the chin can be caused by acne or folliculitis. Most of these cases are caused by staying up late or not getting enough sleep or eating hot pot, or lobster, or durian, or mango hot fruits. It is also possible that the patient himself with the hand picking, after picking secondary infection, leading to inflammation aggravation manifestation. So this time you can use oral anti-inflammatory drugs, generally can oral roxithromycin, can also oral cephalosporin or amoxicillin are available, and then topical mupirocin cream or fusidic acid cream are available.