What Are Actinic Keratoses? Actinic keratoses (AKs) are a common skin condition characterized by rough, red, scaly patches, crusts, or sores on the top layer of skin (see Figures 1 & 2).

But other forms of skin cancer, such as non-melanoma skin cancers, can present in different ways. Below, we outline what to look out for. A sore that doesn't heal. This may look shiny, see through, ...