Actinic keratosis (AK) is a skin condition related to sun exposure, with five common risk factors. These risk factors include prolonged sun exposure, fair skin, outdoor occupations, use of tanning beds, and a weakened immune system. Individuals with fair skin, such as blonde or red hair, are more likely to develop AK due to their lack of melanin which serves as an additional layer of protection from the sun's UV rays. Those who work outdoors or use tanning beds risk overexposure to the sun, increasing their chances of developing AK. People with weakened immune systems, such as those undergoing chemotherapy, are also at an increased risk of developing AK due to the inability of their bodies to fight off the skin condition. Finally, age is a major risk factor, with AK being more common in people over the age of 40. It is important to be aware of these risk factors and take extra care to protect your skin from the sun.