It also has a high cure rate when detected and treated early but left untreated, squamous cell carcinoma can spread to other areas of the body and can be fatal. Melanoma is the most dangerous form of skin cancer and usually appears as a dark brown or black lump with irregular edges. Sometimes, it is multicolored with shades of red, blue, or white. If ignored, melanoma can spread or metastasize to other areas of the body, which can be fatal. The sun can cause cataracts and other eye damage.
Cataracts are one of the leading causes of blindness.
Immune system suppression and disease. Short periods of sun exposure can damage the human immune system and make the body more susceptible to infections and cancers. Also, some diseases can become worse with sun exposure.