Why squamous cell skin cancer can cause a sore that does not heal

Healthy skin repairs damage by coordinating new surface cells, inflammation, and supporting tissue. Squamous cell skin cancer disrupts that orderly process. As the abnormal growth enlarges, it can irritate nearby tissue and create a shallow ulcer. Sun-exposed areas such as the face, ears, scalp, neck, forearms, and backs of the hands are common locations, although it can occur elsewhere. A sore with this pattern can have causes other than cancer, so examination is needed for a diagnosis.

Arrange an appointment with a clinician or dermatologist for a sore that continues, repeatedly scabs, or changes in appearance. Note when it began, whether it bleeds or hurts, and any change in size, edge, colour, or surface. Keep it clean, avoid picking the crust, and protect the area from sun. A clinician may examine it closely and may recommend a small biopsy to identify the cells involved.

Seek prompt medical attention if the sore has ongoing bleeding, rapidly increasing pain, spreading redness, pus, fever, or a quickly growing lump. Urgent assessment is also sensible when a wound repeatedly opens or affects the eyelid, nose, ear, lip, or another area where swelling could interfere with function. These warning signs describe the need for assessment; they do not establish the cause.

Ask whether the sore needs a biopsy, what other conditions could resemble it, and how its location and size affect treatment choices. You can also ask how to dress the area, protect it from sunlight, and check the rest of your skin for new or changing lesions.