Why does squamous cell carcinoma cause sore that will not heal?

Sore That Will Not Heal is a common presentation of Squamous Cell Carcinoma. As abnormal cells grow in the outer skin and sometimes deeper layers, the area may not rebuild a healthy surface normally. A spot can develop a rough scale, crust, tenderness, bleeding, or an open centre, then seem to improve and break down again. Sun-exposed areas such as the face, ears, scalp, lips, and backs of the hands deserve careful attention, although this cancer can occur elsewhere.

Book an examination with a dermatologist or qualified clinician for any sore that persists, repeatedly returns, or changes. Do not keep treating it as an ordinary cut without review. Protect the area from sun, avoid picking the crust, and use gentle cleansing. Take note of its location, changes in size or texture, bleeding, and any previous injury. Diagnosis may require a close examination and a small skin sample; treatment depends on the result and the site.

Arrange prompt care if the sore is enlarging, painful, repeatedly bleeding, foul-smelling, or affecting an eyelid, lip, ear, or other sensitive site. Seek urgent help for bleeding that does not stop with steady gentle pressure, rapidly increasing swelling, spreading redness, fever, or feeling very unwell. A sore has many possible causes, so an examination is needed rather than a conclusion based on appearance alone.

Ask what features make the sore concerning, whether a biopsy is needed, how to care for it while waiting, and which sun-protection habits are appropriate. Ask how quickly the area should be reviewed if it bleeds or changes.