History of exposure to UV rays from the sun, tanning beds, or sun lamps - whether intermittent or year round, even if the exposure was years ago
 

Had several sunburns or experienced severe, especially blistering, sunburns
 

Live in a geographic region receiving high-intensity sunlight, such as Florida, Caribbean, or northern Australia
 

Fair skin, especially when the person has blond or red hair and blue, green, or gray eyes
 

Sun sensitive or tendency to burn or freckle rather than tan
 

Close blood relative has/had melanoma, several more-distant relatives have a history of melanoma, or a family history of other skin cancers
 

Personal history of skin cancer
 

One or more atypical mole
 

50-plus moles
 

Diagnosed with actinic keratoses
 

Overexposure or long-term exposure to x-rays, including patients who received x-ray treatments for acne
 

Long-term treatment with immunosuppressive medication, such as those used to prevent organ rejection or treat severe arthritis
 

Weakened immune system caused by a disease, such as lymphoma or human immunodeficiency virus (HIV)
 

Xeroderma pigmentosum, a rare inherited condition that makes one less able to repair damage caused by sunlight