Melanoma generally is not flat, also known as malignant melanoma, which is a highly malignant cancer originating from melanocytes, commonly occurring in the skin. Men over the age of 60 are a high-risk group, with the most commonly affected areas being the lower limbs and feet, followed by the trunk, head and neck, or upper limbs. Symptoms mainly include rapidly growing melanotic nodules. Initially, normal skin becomes heavily pigmented, or pigmented moles darken and increase in pigment. The skin lesions continually enlarge and harden, accompanied by itching and pain. The lesions of melanoma may be raised, patchy, or nodular, and some may even resemble cauliflower.