Is keratosis an abnormally raised scar?

Keratosis is not an abnormally raised scar. It is a common skin condition that causes dry, rough, and scaly patches on the skin. It is caused by the rapid production of keratin, a protein that forms the outermost layer of the skin. Keratosis can affect any part of the body, but it is most commonly found on the elbows, knees, and ankles. It is not contagious and is usually harmless, although it can be itchy or uncomfortable.