People who are exposed to large quantities of sun radiation can develop skin cancer as early as 20-30, but the disease is much more common in elderly people. Symptoms and treatment depend on what type of cancer it is. Skin cancer is caused by exposure to sun rays particularly the ultraviolet rays. The tumour, in particular, is greatly affected by exposure to sun radiation, and sunburn. A small number of cases are caused by hereditary conditions, but they are also triggered by exposure to sun rays.
Solariums can also cause skin cancer.
The colour of the tumours vary from brown or black to blue or orange. The tumours are characterised by having ragged edges and uneven colours. Off-shots, sores, crusts, and reddening may be seen in the area surrounding the mole. The mole may itch. Moles can be found anywhere on the body, but are typically located on the back, the shoulders, or the back of the legs.