A medicine that protects a transplanted organ, settles inflammatory bowel disease or controls an autoimmune condition can also reduce the immune system’s ability to find and destroy abnormal skin cells. That makes this guide for immunosuppressed patients especially relevant in Australia, where high UV exposure adds another serious layer of risk. Sun protection and timely skin checks are not optional extras. They are part of ongoing care.

Why immunosuppression changes skin cancer risk

Your immune system does more than fight infections. It also identifies cells that have been damaged by ultraviolet radiation and may be starting to behave abnormally. When immune activity is deliberately reduced by medication or illness, those damaged cells can be more likely to persist and develop into skin cancer.

This is particularly significant for squamous cell carcinoma, often called SCC. In people with a weakened immune system, SCCs can occur more often, grow faster and be more likely to recur or spread than they are in the general population. Basal cell carcinoma and melanoma also remain concerns. A history of frequent sun exposure, fair skin, previous skin cancer, older age and a family history can increase the risk further.

The risk is not the same for everyone. It depends on the reason for immunosuppression, the medicines used, the dose, how long treatment has continued and your personal sun exposure history. Someone who has had an organ transplant will usually need a more intensive skin surveillance plan than someone on a short course of immune-suppressing medicine. Your treating specialist, GP and dermatologist can help set the right schedule for you.

Who should be especially alert?

Regular skin checks should be discussed early if you have had an organ transplant or take long-term medicines that suppress immune function, including some treatments for rheumatoid arthritis, psoriasis, inflammatory bowel disease, lupus or blood cancers. People receiving chemotherapy, targeted cancer treatments or high-dose corticosteroids may also need tailored advice.

Do not assume darker skin removes the risk. Skin cancer can affect people of every skin tone, and changes on the palms, soles, nails, lips and areas not usually exposed to the sun can be missed. For immunosuppressed patients, any new or changing lesion deserves attention, regardless of complexion.

If you have previously had a skin cancer removed, tell every clinician involved in your care. A past diagnosis is useful information when deciding how often your skin needs to be examined.

Daily sun protection is treatment support

Australia’s UV levels can be damaging even when the weather feels mild. Check the UV Index and use sun protection whenever it is 3 or above. For many parts of Australia, that means protection is needed for much of the year, not only at the beach or during summer holidays.

Use several protective measures together. Apply broad-spectrum, water-resistant SPF 50+ sunscreen to exposed skin before going outside, and reapply every two hours when outdoors, or sooner after swimming, sweating or towel-drying. Sunscreen is valuable, but it should not be your only defence.

A broad-brimmed hat, close-fitting sunglasses and long-sleeved clothing made from tightly woven or UPF-rated fabric offer more reliable physical protection. Seek shade where possible, especially in the middle of the day, but remember that shade does not block all reflected and scattered UV radiation.

For outdoor workers, gardeners, golfers, fishers and parents watching sport, protection needs to fit real life. Keep sunscreen near the front door, in your work bag or ute, and make protective clothing part of the routine rather than something saved for high-heat days. If sunscreen irritates your skin, ask a pharmacist or clinician about a suitable alternative rather than going without it.

Avoid deliberate tanning and never use solariums. A tan is evidence of skin damage, not protection. For someone taking immunosuppressive medication, avoiding extra UV exposure is a practical way to reduce an already elevated risk.

A guide for immunosuppressed patients: plan regular skin checks

A professional skin examination can find suspicious lesions before they become painful, ulcerated or obvious. Ask your GP, transplant team, treating specialist or dermatologist how often you should be checked. Some people need examinations every few months, while others may be reviewed annually. The right interval depends on your individual risk and should change if new lesions start appearing.

Choose a clinician experienced in assessing skin cancer, particularly if you have had a transplant, multiple previous skin cancers or rapidly developing lesions. A full skin check should include areas you may not easily inspect yourself, such as the scalp, ears, back, buttocks, soles, between the toes and genital area when clinically appropriate.

Between appointments, get to know your own skin. This is not a replacement for professional checks. It is an early-warning habit. Once a month, use a mirror or ask someone you trust to help check hard-to-see areas. Take note of spots that are new, changing, bleeding, crusting, tender or simply not healing.

Photographs can help you notice change over time, particularly for areas with many freckles or moles. They should support, not delay, a clinical review. If you are worried about a spot, do not wait to see whether the next photo looks better.

Changes that need prompt medical review

Many skin cancers do not look like the textbook dark mole people expect. In immunosuppressed patients, a persistent rough or scaly patch, a firm pink lump or a sore that repeatedly crusts can be just as concerning as a changing pigmented spot.

Book a prompt appointment for a lesion that grows, changes colour or shape, bleeds without a clear reason, becomes painful, itches persistently or fails to heal within a few weeks. Also seek review for a wart-like growth that enlarges quickly, a new tender lump, or a dark streak or changing mark under a nail.

For moles and pigmented lesions, remember the ABCDE signs: asymmetry, border irregularity, colour variation, diameter or difference, and evolving change. The final point matters most. A spot that looks different from your other spots, sometimes called an “ugly duckling”, should be assessed.

Do not try to diagnose a suspicious lesion from online images or treat it repeatedly with over-the-counter creams. A clinician may use dermoscopy, take photographs for monitoring or arrange a biopsy. Early assessment can mean a simpler treatment and a better outcome. Every minute counts when a skin cancer is changing quickly.

Prepare for your appointment

Bring a current list of all medicines, including tablets, injections, creams and supplements. Tell the clinician why you are immunosuppressed, when treatment began and whether your dosage has changed. Mention any previous skin cancers, biopsies, radiation treatment or family history of melanoma.

Before your visit, write down when you first noticed the lesion and what has changed. If it bleeds, crusts or comes and goes, say so. Clear details help the clinician judge urgency and decide whether monitoring, treatment or referral is needed.

Never stop or reduce immunosuppressive medication because of skin cancer concerns without advice from your treating team. These medicines may be essential for preventing transplant rejection or controlling serious disease. In some cases, specialists can review the treatment plan after a skin cancer diagnosis, but that decision must be carefully managed.

A skin check is a small appointment with potentially life-saving value. If you are immunosuppressed and have not discussed your skin cancer risk with a clinician, make that conversation your next practical step.