Lipoma is a type of benign tumor, classified as a superficial disorder. Its tissue is composed of fatty tissue. Patients often develop a lump under the skin, which has clear boundaries and the skin surface does not show swelling or ulceration. Generally, the lump is lobular or flat in shape. Since lipoma is a benign tumor, it can typically be managed by regular check-ups. If the lipoma is relatively large, or if there is localized concealed pain, surgical removal can be performed under local anesthesia.