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By LeMuse Health & Medical Aesthetics | November 11, 2026 If you have rough, scaly patches on your face, scalp, chest or hands that never seem to go away, you may be looking at actinic keratoses (AKs). They are among the most common skin findings in people with years of sun exposure, and they are worth taking seriously. What are actinic keratoses, and why do they matter? AKs are precancerous patches caused by cumulative UV damage. They matter for two reasons. A small number c