Actinic keratosis are patches of skin that have been exposed to a lot of sun throughout life and have become damaged over time. Actinic keratosis are often red or light brown in color with small hard scales. The cells in these patches of skin grow faster than normal cells and although most actinic keratosis are harmless, they can sometimes develop into a form of skin cancer called squamous cell carcinoma. This is why you should treat your actinic keratosis.
While some actinic keratosis appear as uneven or scaly patches on the skin, it is possible that others appear as invisible sun damage around the skin lesion in larger patches.