Actinic keratosis, also known as solar keratosis, is a skin condition in which lesions appear on the outer layer of skin as a result of too much exposure to ultraviolet sunlight. It is characterized by scaly rough bumps appearing on the skin and if left untreated, it may lead to skin cancer developing. 

It typically appears in older patients over the age of 40 but may manifest at an earlier age, particularly among those living in sunny regions. People with fair skin and blond or red hair are at a higher risk of developing actinic keratosis. Surgical removal of growths, using freezing, burning or chemical peels, may be recommended by a physician, but medication may also be prescribed. 

Commonly prescribed medications for treatment of actinic keratosis are topical antivirals, pyrimidine analogs, and topical non-steroidal anti-inflammatories (NSAIDs), such as Solaraze (diclofenac sodium).