Actinic keratoses (AKs) are common skin lesions. Caused by years of sun exposure, AKs also arecalled"solar keratoses" or "sun spots." Fair-skinned people are more susceptible, and AKs tend to appear on skin that receives the most sun.The forehead, ears, neck, arms, hands, lower lip, a bald scalp, and lower legs of women are common sites. No matter where AKs develop, they are considered the earliest stage in the development of skin cancer. 

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