Andrea Markowitz, Ph.D.
May 24, 2010
Actinic keratosis (AK), is a dry, scaly, rough-textured spot, patch or lesion that forms on the outer skin. It's caused by cumulative exposure to ultraviolet (UV) light, such as sunlight or tanning lamps. AKs usually appear after age 40 or 50 because they take many years to develop. The Skin Cancer Foundation reports more than ten million Americans currently have AK.
According to The American Academy of Dermatology's AK Web site, AKs are considered the earliest stage in the development of skin cancer and can progress to a sometimes fatal type of skin cancer called squamous cell carcinoma (link to squamous cell carcinoma story-wellness channel). The more AKs you have, the greater the chance that one or more will become cancerous. People who have AKs should seek a dermatologist's care.
What to Look For
Anyone who has had prolonged sun exposure can develop AK. But fair-skinned, light-haired, light-eyed people have an even higher likelihood of developing AK, especially if they've spent time in the sun and are older.
Check your skin regularly for any of the following signs of AK, giving special attention to areas that received the most sun exposure, such as your face, ears, lips, scalp, neck, forearms and the back of your hands.
As described by the AAD, newly-developing AKs are too small to be seen and can be detected only by touch. So use both your eyes and fingers to look for:
An area that feels rougher than the surrounding skin. It may feel like sandpaper and have a scaly or warty texture.
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