A boil is an acute purulent inflammation of the hair follicle and its deep surrounding tissues. The treatment of boils is divided into the following cases. If the boil has not broken down, you can disinfect the boil and the surrounding skin with tincture of iodine or iodophor, and then apply topical plucking cream, magnesium sulfate ointment, or ichthyolite ointment to reduce swelling and pain, and make the boil mature and heal. If the boil has already emerged and drained pus, you can eliminate the pus with hydrogen peroxide, disinfect the boil and surrounding skin with iodophor, and then apply Bactrim ointment or ichthyolite ointment to the affected area. Boils should be prevented from being squeezed, and those with more severe symptoms need oral antibiotics such as amoxicillin. There is also a case of large boils and carbuncles, which need to be treated in the hospital by incision and drainage of pus followed by topical antibacterial and anti-inflammatory medication to prevent systemic infection. Frequent or multiple boils occur, in which case some related diseases such as diabetes, obesity, overproduction of sebaceous glands and other related problems should be checked and treated.