A small bulge on the finger may be caused by skin boils, common warts, lipoma, etc. It can be dealt with by applying ointment, laser treatment and surgery. 1. Skin boils: If the patient has a small bulge on the finger and there is no obvious reaction such as redness, swelling and oozing, he/she can locally apply medications such as iodophor or mupirocin ointment to relieve the inflammation. 2. Common warts: related to human papilloma virus infection, will gradually increase. It can be relieved by applying salicylic acid ointment and imiquimod cream locally, or removing the skin surface lesions by laser treatment. 3. Lipoma: Lipoma is a common benign tumor of the soft tissues, and if it occurs in the finger area, it may lead to a small bulge on the finger. The main treatment for lipoma is surgical excision. Patients with a small bulge on the finger should go to the regular hospital in time to find out the cause of the disease, targeted treatment under the guidance of professional doctors. During the treatment period, we should do a good job of local skin cleaning and care, to avoid bacterial infection.