A scaly patch that will not heal, a tender lump, or a sore that repeatedly crusts and bleeds should not be watched for months. Squamous cell carcinoma treatment is usually highly effective when the cancer is found early, but delayed assessment can allow some tumours to grow deeper, spread along nerves, or reach nearby lymph nodes.

This article refers to cutaneous squamous cell carcinoma – a common skin cancer that develops in the skin’s squamous cells. It often appears on chronically sun-exposed areas such as the face, ears, scalp, neck, forearms, hands and lower legs. It can also occur on the lip, where prompt medical assessment is particularly important.

Australia’s high UV levels mean regular skin checks and quick action on changing lesions are practical health measures, not overreactions. Knowledge can save your life, but a diagnosis needs a doctor’s examination and, in most cases, a biopsy.

How squamous cell carcinoma treatment is chosen

There is no single treatment that suits every squamous cell carcinoma. Your GP, skin cancer doctor, dermatologist, surgeon or multidisciplinary cancer team will consider the pathology result alongside the size, depth and position of the cancer.

They will also consider whether it is a first cancer or a recurrence, how quickly it has grown, whether it has invaded nerves or blood vessels, and whether you have a weakened immune system. People taking immune-suppressing medicines after an organ transplant, for example, can develop more aggressive or multiple squamous cell carcinomas and may need closer follow-up.

The distinction between squamous cell carcinoma in situ and invasive squamous cell carcinoma also matters. In situ disease is confined to the top layer of skin. Invasive disease has moved beyond that layer and generally requires treatment that confirms the whole tumour has been removed or destroyed appropriately.

A biopsy is the turning point. It confirms what the lesion is and can provide information about its features. Do not assume a spot is harmless because it resembles a wart, eczema, a dry patch or a persistent pimple. Skin cancers do not always look dramatic.

Surgery is the main treatment for most cases

For most invasive skin squamous cell carcinomas, surgery is the preferred treatment. The clinician removes the cancer with a margin of normal-looking skin around it, then sends the specimen to a laboratory. The pathology report helps confirm whether the cancer has been fully excised.

A straightforward excision may be performed under local anaesthetic in a clinic. The wound may be closed with stitches, allowed to heal naturally, or repaired with a skin graft or flap when the site or size requires it. Scars are an understandable concern, particularly on the face. However, the priority is complete cancer removal while planning the best possible functional and cosmetic result.

Mohs surgery for high-risk or delicate sites

Mohs micrographic surgery is a specialised form of surgery that removes the cancer in thin layers, checking each layer under a microscope during the procedure. It can be especially useful for cancers on the nose, eyelids, lips, ears, fingers or genitals, and for recurrent or high-risk tumours where preserving healthy tissue is important.

Not every squamous cell carcinoma needs Mohs surgery. Standard excision is often appropriate and effective. Your treating clinician can explain why one approach is recommended over another, including referral to a specialist if the cancer is in a complex location.

Other local treatments in selected situations

For carefully selected superficial lesions, particularly squamous cell carcinoma in situ, treatment may involve curettage and cautery, cryotherapy, a medicated cream, or a light-based treatment known as photodynamic therapy. These options are not interchangeable with surgery for an invasive cancer.

Topical treatments can be useful for certain early surface cancers, but they rely on the correct diagnosis, correct use and reliable follow-up. If a treated area persists, thickens, becomes painful or begins bleeding, it needs reassessment rather than repeated self-treatment with pharmacy products.

When radiotherapy or systemic treatment may be needed

Radiotherapy uses targeted radiation to destroy cancer cells. It may be recommended when surgery is not suitable because of the tumour’s location, a person’s health or the likely impact of an operation. It can also be used after surgery if pathology shows a high risk of the cancer returning.

Radiotherapy is planned carefully, but it has trade-offs. Treatment commonly involves multiple appointments, and skin in the treated area can become sore, red or dry. Longer-term effects depend on the site treated and should be discussed with the radiation oncology team.

A small proportion of squamous cell carcinomas are locally advanced or metastatic. This means they have grown extensively into nearby structures or spread to lymph nodes or other parts of the body. Care is usually coordinated through a multidisciplinary team and may include surgery, radiotherapy, immunotherapy, or a combination of treatments.

Immunotherapy helps the immune system recognise and attack cancer cells. It has improved options for some people with advanced cutaneous squamous cell carcinoma, but it is not appropriate for everyone and can cause immune-related side effects. Decisions about systemic treatment need specialist input, particularly for people with autoimmune conditions or organ transplants.

What happens after treatment

Treatment does not end when the wound is dressed or the final radiotherapy session is complete. Your clinician will advise when to return for a wound check, removal of stitches and review of the pathology result. Ask directly whether the margins were clear and what that means for your individual follow-up plan.

People who have had one squamous cell carcinoma have a higher chance of developing another skin cancer. Regular professional skin checks are therefore part of ongoing care. The frequency depends on your history and risk factors, but it may be more frequent after a high-risk cancer, multiple cancers or treatment for advanced disease.

Between appointments, check your own skin and ask someone to help inspect difficult areas such as the scalp, back and ears. Pay attention to new or changing spots, persistent crusted lesions, rapidly growing lumps and sores that do not heal. Also seek review for a new tender lump near the original treatment area or persistent swelling in the neck, armpit or groin.

Sun protection remains essential after a diagnosis. Use broad-spectrum SPF 50+ sunscreen correctly, wear protective clothing and a broad-brimmed hat, seek shade, and avoid deliberate tanning. These steps cannot erase past sun damage, but they can reduce further UV exposure.

When to book a skin check urgently

Do not wait for your next routine appointment if a lesion is changing quickly. Arrange a prompt assessment if you notice a sore that has not healed within a few weeks, a firm or tender growing nodule, repeated bleeding or crusting, a scaly patch that persists despite treatment, or a changing spot on the lip, ear or scar.

This is especially urgent if you are immunosuppressed, have previously had skin cancer, work outdoors, or have had substantial cumulative sun exposure. Skin of colour can develop squamous cell carcinoma too, sometimes in less sun-exposed areas or within chronic wounds and scars. Any persistent, unusual lesion deserves a clinical opinion.

Early squamous cell carcinoma treatment is often simpler, less invasive and more likely to be curative. If a spot is worrying you, book a skin check now. Every minute counts when a change on your skin needs an answer.