What Is Actinic Keratosis?

Actinic keratosis is characterized by a persistent small (2 to 6 mm in diameter) rough spot or red, pink, or brown plaque. These lesions are usually dry or scaly and surrounded by broken blood vessels and brown spots. AK is precancerous and caused by UVB damage, and about 10% will develop into cancer in just a two-year period. Patients over the age of 40 may notice that their actinic keratosis patches bleed on occasion.