A fire boil is actually a folliculitis, which is a bacterial infection in the area of the hair follicle. It does not really matter where the folliculitis occurs. Most likely, it is a localized infection that occurs when a small skin breakdown occurs in the hair follicle and bacteria invade the skin from this breakdown. The reason why some patients develop fire boils on their chin may be closely related to their daily living habits, for example, some patients do not wash in time, and they may mix their personal items with other people, such as pillowcases, towels and bath towels. Other patients may be related to bad bowel habits, or to a preference for spicy and irritating foods.