Actinic keratosis is a skin condition caused by long-term sun exposure causing damage. It is characterized by red, often itchy plaques. They can be found on any sun-exposed skin, but are found most frequently on areas that have had the most sun exposure over the years, such as the face, arms, and chest. It is a precancerous condition that can become skin cancer if not treated. Here is an article with more details on this common condition. The doctors at Leestma Healthcare can treat you for this condition as well as other skin conditions.