Melanoma in specific parts of men is usually not directly caused by ultraviolet rays but may result from metastasis of melanoma from other parts of the body.
Most skin cancers are caused by ultraviolet radiation from sunlight. Prolonged exposure of the eyes to direct sunlight can lead to melanoma in the iris, which is very dangerous and potentially life-threatening.
Hardening of the skin in the ear canal should not be ignored. If it does not recover after repeated cleaning, skin cancer should be highly suspected. If the skin changes persist for more than a month without improvement, a dermatoscope examination should be conducted as soon as possible.
The gluteal cleft, which extends backward from the anus, is a high-risk area for skin cancer, commonly squamous cell carcinoma. In most cases, it is benign.
Melanoma is also common inside and around the anus or in the intestines. If there is unexplained bleeding, painful bowel movements, or gastrointestinal discomfort, attention should be paid.
Abnormalities of the scalp are often overlooked or mistaken for dandruff. If there is a foreign body sensation on the scalp accompanied by severe itching, bleeding, or burning, the cause should be identified and treated accordingly.
In recent decades, with the popularity of nail art, prolonged exposure of fingers and toes to UV lamps and quick-drying equipment may lead to skin cancer under the nails.
Although the tongue is not exposed to ultraviolet rays, melanoma is prone to metastasize. Especially for those who smoke or chew betel nut, the risk of melanoma in the tongue or mouth increases.