They can also be an indication of the beginning of skin cancer. Typically they appear in people over the age of 40 however, in some areas where climate is mild year-round, like right here is Southern California, these lesions appear in much younger people. The most likely candidates for Actinic Keratosis are people with fair skin, blond or red hair, and blue or green eyes.
You know you have this condition is you have developed rough, scaly patches on your skin (called keratosis). A history of sunburn can also increases the risk of getting actinic keratosis.