If patients suspect that they have melanoma, they must go to a qualified hospital for examination. The diagnosis of melanoma mainly relies on visual inspection of colored moles that vary in color and shape, which can be directly observed with the eye. Also, if previously existing moles have enlarged or changed shape recently, these are signs that we need to pay attention to. If patients are suspected of having melanoma after a diagnosis, it is recommended to perform a complete excisional biopsy of the lesion, followed by a pathological examination after the surgery.