Squamous cell carcinoma may begin as a new growth, a spot or bump that gets larger over months or years, or a sore that does not heal This type of skin cancer often appears as a flat reddish area with a crusty surface that does not clear up. It may develop into a firm, growing lump that then becomes an open sore (ulcerates).
Don't wait for a growth or sore to hurt before seeing a doctor; pain is not usually associated with skin cancers, especially in the early stages. Untreated, squamous cell carcinoma may spread to the lymphatic system, bloodstream, and nerve pathways, where it can cause pain and other signs of serious illness.
