Pustules on the stomach that hurt when touched may be caused by boils, carbuncles, sebaceous cysts with infections, etc. They can be treated by medicines such as ichthyol ointment, mupirocin ointment, ceftazidime, etc. or by surgeries under the guidance of a doctor. 1. Boil: It is a purulent inflammation of the deep part of the hair follicle and the surrounding tissues. If it occurs in the abdomen, it can cause a local hard lump with redness, swelling and pain. It can be treated by applying ointment such as ichthyol ointment and Jin Huang San. If abscess has been formed, it is necessary to perform surgical incision and drainage. 2. Carbuncle: multiple folliculitis caused by Aureobasidium infection, resulting in deep infection caused by the aggregation of boils, preferably in the neck, back, but also in the abdomen, can cause localized lumps, the surface of the surface can appear more than one pustule, inside the pus, and pain is obvious. Topical medications include mupirocin ointment, and if necessary, ibuprofen and other medications can be taken to relieve pain. 3. Sebaceous cysts with infection: due to sebaceous gland excretory duct obstruction, sebum secreted by the sebaceous glands can not be discharged, in the gland collection, the formation of cysts, such as accompanied by infection, cysts around the redness, swelling, pain, and so on. In this case, first use ceftazidime to control the infection, and then surgical excision treatment. It is recommended that patients with pustules on the stomach that hurt when touched should seek medical attention in a timely manner, and be given standardized treatment after the cause is clarified by the doctor.