Melanoma may be raised or flat. Melanoma is a malignant tumor formed by malignant transformation of melanocytes, often irregular in shape, with jagged borders, often poorly demarcated from the surrounding skin, and may be flaky, painful, and may also be accompanied by local itching. Clinically common melanoma is divided into the following four types: 1. Superficially disseminated type: the most common type in Caucasians, accounting for about 70%. It is prevalent on the trunk and extremities and is flat or slightly raised. The lesions appear as papules and nodules, or diffuse sclerosis, with late onset of ulceration; 2. Nodular type: Prevalent on the top of the head, trunk, and soles of the feet. It starts as blue-black or dark brown raised nodules, expanding horizontally or vertically, rapidly increasing in size, papillomatous, myxoid or ulcerated; 3, freckle-like type: Most commonly seen in the elderly, brown patches appear on the face and exposed areas, which may be accompanied by dark brown or black spots, often in a raised state, with irregular edges, slow growth and development; 4, limb freckle-like type: The most common type in Chinese. It mainly grows on the soles of the feet, palms and under the nails, with brownish-yellow, brownish-brown or black color, usually flat, and can form nodules in the vertical growth period without timely treatment, with relatively poor prognosis. Therefore, melanoma may be raised or flat, related to the specific type of melanoma. It is inaccurate to determine whether melanoma has occurred simply by whether the melanoma is raised or flattened in appearance; melanoma needs to be diagnosed by histopathological findings.