The main symptom of squamous cell carcinoma
is a growing bump that may have a rough, scaly surface and flat reddish patches. The bump is usually located on the face, ears, neck, hands, or arms, but may occur on other areas. A sore that does not heal can also be a sign of squamous cell cancer. Any change in an existing wart, mole, or other skin lesion should be examined by a health care professional.