Although it is difficult to attribute any form of cancer to a single cause, exposure to ultraviolet radiation from the sun is a specific risk factor for skin cancer on the nose, states the Centers for Disease Control and Prevention. The nose is highly susceptible to damaging effects of the sun's rays because it protrudes from the face and receives disproportionate exposure to sunlight. Other risk factors include age, ethnicity, gender, fair skin, immune deficiency and genetic predisposition to cancer.
Sunscreen with a solar protection factor, of SPF, of 15 or greater offers some protection from potentially carcinogenic UV rays, states the Mayo Clinic. It is also wise to avoid exposing the skin to sunlight at peak hours of the day.
Symptoms of skin cancer on the nose include the appearance of a lesion, a pearly or waxy bump, a red nodule or an irregularly-shaped or discolored mole, notes WebMD. Itching and bleeding may also occur.
There are three major types of skin cancer, explains the Skin Cancer Foundation. The vast majority are either basal cell carcinomas or squamous cell carcinomas; these cancers can disfigure the area of the body in which they appear, but tend not to spread to other parts of the anatomy. Melanomas, by contrast, are aggressive skin cancers that are capable of spreading, and can be fatal in the absence of early medical treatment.