DefinitionActinic keratosis is a precancerous growth on the skin.Alternative NamesSolar keratosis; Sun-induced skin changes - keratosis; Keratosis - actinic (solar)Causes, incidence, and risk factorsActinic keratosis is caused by sun exposure.Risk factors for actinic keratosis include:Having fair skin, blue or green eyes, or blond or red hairLong-term, daily sun exposure (for example, if you work outdoors)Multiple, severe sunburns early in lifeOlder ageSymptomsRough and dry skin lesionPatch or growth on the skin Limited to one area (localized)Located on the face, scalp, back of the hands, chest, or other sun-exposed areasGray, pink, red (erythematous), or the same color as the skinBegins as flat and scaly areasLater develops a hard and wart-like or gritty, rough, and "sandpapery" surface -