A rough, scaly patch on your skin that develops from years of exposure to the sun. It's most commonly found on your face, lips, ears, back of your hands, forearms, scalp or neck. These pre-cancerous spots are another form of a chronic wound caused by sun damage. They appear to have more DNA involvement which is why they can become skin cancer over time. Osmosis has a patented product just for this issue called Catalyst. The idea is that we simply have to heal the dermal-epidermal junction in order to clear actinic keratoses.