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Skin cancer radiation
Basal Cell and Squamous Cell Skin Cancer Radiation — What to Expect
Radiation is a genuine option for basal cell and squamous cell skin cancers, particularly on an eyelid, nose, ear or lower leg where an operation would be hard to close. This page answers the three questions people actually ask: how many sittings, what the skin will look like afterwards, and what the follow-up involves.
Medically reviewed by Dr. Venkata Sushma P, Radiation Oncologist, MBBS · MD (Radiation Oncology) · Last reviewed August 2026
- A schedule built around you — Courses commonly run from about five sittings to around thirty, on weekdays. Shorter schedules are often chosen for older or frail patients, so daily travel is not what decides your treatment.
- Straight talk about how the skin will look — The treated patch usually stays a slightly different colour and texture for good. You hear that before you start, not afterwards, and nobody promises you a cosmetic result.
- Hands, legs and joints planned for function — Where the lesion sits over a limb or a joint, slow wound healing and stiffness are planned for from the first appointment, not treated as a surprise afterwards.
- Surgery and radiation compared honestly — For most skin cancers surgery is the first choice. We say so, and we explain plainly why radiation is or is not the better fit for your particular lesion.
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The first question everyone asks
How Many Sittings Will I Need for Skin Cancer Radiation?
Most courses run from about five sittings to around thirty, on weekdays. The number depends on the size and depth of the lesion, where it sits, and whether radiation is replacing surgery or following it. Shorter schedules with fewer, larger sittings are often chosen for older or frail patients.
That range is wide because a small basal cell carcinoma on a cheek and a thick squamous cell carcinoma on a lower leg are not the same problem. Your radiation oncologist sets the schedule after reading the biopsy report and examining the site. NCCN and ASTRO both accept a range of accepted schedules for skin cancer rather than one fixed course, which is why a number quoted by a neighbour or a search result may have nothing to do with yours.
Each sitting takes minutes
The beam is on for a few minutes. Most people are in and out of the department in fifteen to twenty minutes once treatment is under way.
Weekdays, with weekends off
Sittings are given Monday to Friday. The weekend break is part of the plan, not a gap, and it gives normal skin time to recover.
Fewer sittings for frailer patients
Where daily travel is hard, a shorter schedule with larger sittings is often used. Ask for it directly if the journey is your main worry.
After surgery, the aim is different
Radiation given after an operation, for involved margins or nerve involvement, is planned differently from radiation given instead of surgery.
One practical point for families travelling in from a district. Ask for the likely number of sittings at the very first consultation, before anything is booked, because that number decides your accommodation, your transport and who takes leave from work. Ask for a written estimate at the same visit; any figure quoted is indicative, as of August 2026.
Weighing the options
Should I Have Surgery or Radiation for a Basal or Squamous Skin Cancer?
For most basal and squamous cell skin cancers, surgery is the first choice. It removes the lesion and gives a pathology report on the margins within days. Radiation is chosen when surgery is unsuitable, unwanted, or would leave a wound that is hard to close, and after surgery when margins or a nerve are involved.
That is the honest position, and it is worth stating plainly because a page about radiation has every incentive to say otherwise. What follows sets out each option as it actually is, so you can ask your own team why they are recommending one over another for your lesion.
| Option | What it involves | Who it usually suits | What it asks of you | The trade-off |
|---|---|---|---|---|
| Surgical excision | The lesion is cut out with a margin of normal skin around it and the wound closed with stitches, a flap or a small graft, usually under local anaesthetic. | Most basal and squamous cell cancers where the site can be closed and the patient is fit for a small procedure. | One procedure, wound care at home, and stitches out after about a week. | It leaves a scar. If the margins come back involved, a further procedure or radiation may then be advised. |
| Mohs micrographic surgery | The lesion is removed in thin layers and each layer is examined under the microscope in the same sitting until the margins are clear. | Recurrent or poorly defined lesions on the face, and sites where every millimetre of normal skin matters. | A long day at the centre, and access to a trained Mohs surgeon. | It spares the most normal tissue, but availability in India is limited and it is not offered at every centre. |
| External beam radiation | A course of short weekday sittings. Nothing touches the lesion. A mask, shield or cut-out may be made so the beam is shaped tightly and the eye or lens is protected. | Eyelid, nose tip, ear and lip lesions; large lesions; patients who cannot or do not want an operation; involved margins or nerve involvement after surgery. | Daily travel across one to six weeks, and a skin reaction that peaks after the course ends. | There is no margin report, the treated patch changes colour and texture for good, and it is generally advised against in people with a genetic condition that predisposes them to skin cancers. |
| Surface brachytherapy | A sealed radiation source is held against the skin by a custom mould for a set time at each session. | Curved surfaces such as a nose, ear or scalp, where shaping an external beam is harder. | A mould is made first, then a small number of sessions. | Availability is limited, and specific safety precautions apply while a source is in place. |
| Other skin-directed options | A topical treatment or a destructive technique applied in clinic, as advised by a dermatologist. | Small, superficial, low-risk lesions only. | Weeks of self-applied treatment at home, or repeated clinic visits. | Not suitable for deeper or higher-risk lesions, and there is no margin check afterwards. |
Radiotherapy is delivered at an NABH-accredited partner centre; CION Cancer Clinics coordinates your treatment plan, your oncology team and your care throughout. That means the surgical opinion and the radiation opinion are put in front of you together, in one consultation, rather than you carrying a file between two departments.
If the lesion turns out to be a melanoma rather than a basal or squamous cell cancer, the reasoning changes completely. Our page on when radiation is used for melanoma sets out where it does and does not have a role.
Did you know?
NCCN lists radiation as a primary treatment option for basal and squamous cell skin cancers when surgery is not the right choice — and, in the same guideline, generally advises against radiation for people who have a genetic condition that predisposes them to skin cancers. It is one of the few situations where the answer is a clear no. If anyone in your family has had many skin cancers from a young age, say so at the first consultation, because it can change the recommendation. Guidance current as of August 2026.
Appearance, honestly
What Does the Skin Look Like During and After Radiation?
The treated patch turns pink, then red, dry and itchy. It often peels or crusts in the final week and for one to two weeks afterwards, because the skin reaction peaks after the course ends. Healing usually takes four to eight weeks. The patch then stays permanently a little different from the skin around it.
Almost nobody tells patients that last part clearly enough, and it is the thing that surprises people most. Radiation aims to clear the lesion. It does not aim to return the skin to exactly how it looked, and no honest radiation oncologist will promise you a cosmetic result. Knowing that before you start is what makes the change bearable when you see it.
Week 1 to 2
Usually nothing visible, or a faint pinkness. Most people feel entirely normal and carry on with daily life.
Week 2 to 4
The patch reddens, feels dry and tight, and may itch. Hair in the treated area usually falls out.
The final week
Skin may peel, weep or crust, and the lesion itself often crusts over. This is expected, not a setback.
Week 1 to 2 after the course
Often the sorest stage. The reaction peaks after treatment ends, which catches many patients off guard.
Week 4 to 8 after
New skin covers the area. Redness fades gradually. Most people are comfortable again by this point.
Months and years later
The patch may stay paler or darker, feel thinner, show fine blood vessels, and grow no hair or sweat.
Where the lesion is on a hand, forearm or lower leg, appearance is not the only concern. Skin over a limb is thinner and heals more slowly, and a reaction close to a joint can leave the area tight for a while. That is planned for from the first appointment, and it is covered in more depth in our pages on wound healing problems after radiation to a limb and limb stiffness and function afterwards.
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Step by step
What Actually Happens at Each Sitting?
Seven stages, from consultation to first follow-up. You are seen, the area is planned and marked, a mask or shield is made for facial sites, then short weekday sittings begin. You are reviewed weekly. The skin peaks after the course ends, and the first follow-up follows four to eight weeks later.
1
The consultation, with the biopsy report in hand
A radiation oncologist reads the pathology, examines the lesion and the skin around it, and checks the nearby lymph nodes. This is the visit at which you should ask the number of sittings, the likely schedule, and what the skin will look like. Bring the biopsy report and any earlier skin surgery notes.
2
The planning session
The treatment area is measured and marked, and a scan may be taken so the depth of treatment can be set. Nothing is treated at this visit. For a face, ear or scalp lesion a mask, shield or cut-out is made so the beam is shaped tightly to the lesion and the eye or lens is protected.
3
Your marks and your mould
Small marks on the skin, or the mask itself, make sure the same area is treated identically every day. Do not scrub the marks off. If they fade, tell the radiographers rather than redrawing them yourself, and they will be replaced before the next sitting.
4
The daily sittings
You lie or sit still while the machine moves around you. Nothing touches the lesion and you feel nothing while the beam is on. The beam is on for a few minutes and the whole appointment is usually fifteen to twenty minutes. You drive, eat and go about your day normally afterwards.
5
The weekly review
Once a week you are seen by the radiation oncologist or the nursing team, and the skin is looked at properly. This is when soreness, itching or a break in the skin should be reported. Reactions are far easier to settle when they are picked up at this review than a fortnight later.
6
The last week, and the two weeks after it
This is when the skin reaction is at its worst, and it typically peaks after the final sitting rather than before it. Dressings and skin care are stepped up at this point. Do not assume something has gone wrong because the skin looks worse once treatment has stopped.
7
The first follow-up
Usually four to eight weeks after the last sitting, once the reaction has settled enough for the site to be assessed. The treated patch, the rest of your skin and the nearby lymph nodes are all examined, and the surveillance schedule for the years ahead is agreed with you.
Your radiotherapy is delivered at an NABH-accredited partner centre; CION Cancer Clinics coordinates your treatment plan, your oncology team and your care throughout. In practice that means one team keeps hold of your file across the consultation, the planning session, the daily sittings and the follow-up, so you are not re-explaining your history at every desk.
For patients travelling in from outside Hyderabad for a course of daily sittings, the journey matters as much as the treatment. Our guide to accommodation near a radiation centre in Hyderabad is worth reading before you book anything.
What to do at home
How Do I Look After the Treated Skin at Home?
Wash the area gently every day. Use only the dressing or cream your radiation team gave you. Keep clothing, straps and spectacle arms off the patch. Expect the reaction to peak after the course ends. Cover the area from the sun for life. And call the same day if the skin breaks down or a fever starts.
Open each one. Seven instructions, and the first six are what decide how comfortable the last fortnight is.
Wash the treated skin every day, gently
Skipping washing does not protect the area, it just lets crusts and sweat build up under the reaction. Use lukewarm water and a mild soap, wash with your hand rather than a cloth, and pat the skin dry with a soft towel instead of rubbing it. Do this every day, including the days you are not being treated, unless your radiation team has told you otherwise for a specific reason.
Use only what your radiation team has given you
This is the rule people break most often, usually with good intentions. Household remedies, oils, powders, antiseptics and shop-bought creams can all change how the skin behaves during a course of radiation, and some leave a residue on the surface. Use only the dressing or cream your radiation team has prescribed for you, apply it as instructed, and check with them before you add anything at all, however harmless it seems.
Keep straps, collars and spectacle arms off the patch
Friction is what turns a manageable reaction into a broken one. A shirt collar over a neck lesion, a spectacle arm over an ear, a bra strap over a shoulder or a watch strap over a forearm will rub the area a hundred times a day without you noticing. Wear loose, soft cotton over the area, move the frame or the strap if you can, and tell the radiographers if something is unavoidable so they can suggest a way around it.
Expect the worst of it after the course ends, not during
The skin reaction typically peaks in the one to two weeks after your final sitting, then settles over the following four to eight weeks. Families often panic at this stage because treatment has stopped and the skin looks worse than it did on the last day. That sequence is normal and expected. Keep using the dressings and skin care you were given, and keep the follow-up appointment, because that is the visit at which the site is properly assessed.
Cover the treated area from the sun, from day one and for life
Treated skin is thinner and more sensitive to sun than the skin around it, permanently. Keep the area covered with clothing, a wide-brimmed hat or a scarf whenever you are outdoors, and use sun protection on exposed skin as advised by your team once the reaction has healed. This is not a temporary instruction for the treatment weeks. It applies for the rest of your life, and it also lowers the chance of a further skin cancer elsewhere.
Do not shave, wax, scrub or apply heat or ice to the area
A razor over treated skin can open it. Waxing and scrubbing do the same more forcefully. Hot water bottles, heat packs, ice packs and hot showers directly on the area all stress skin that is already working hard to repair itself. If you need to shave nearby, use an electric shaver and stay off the marked area, and ask the radiographers what is safe for your specific site rather than guessing from a general leaflet.
Call the team the same day if you see any of these signs
Some things should not wait for the weekly review. Spreading redness with warmth, pus or a foul smell, a fever, increasing pain that painkillers are not touching, bleeding that does not stop with gentle pressure, or an area of skin that breaks open and gets rapidly larger. Ring the department or call 1800 202 8726 the same day. These are usually manageable when they are seen early.
After treatment
What Is the Follow-Up After Skin Cancer Radiation?
Your first review is four to eight weeks after the last sitting. After that, review is risk based: more often in the first two years, when a recurrence is most likely to show, then less often but lifelong. Each visit checks the treated patch, the rest of your skin and the nearby lymph nodes.
NCCN recommends this pattern of long-term skin surveillance for a straightforward reason. Anyone who has had one basal or squamous cell skin cancer is more likely than average to develop another, usually somewhere else on sun-exposed skin, and a second one found early is a much smaller problem than a second one found late. Follow-up is not about anxiety. It is about catching the next thing while it is still small.
What the doctor checks
The treated patch, the skin around it, the rest of your skin from scalp to feet, and the lymph nodes nearest the site.
What you check, monthly
Any new lump, a sore that will not heal in a month, a patch that bleeds or crusts repeatedly, or a mark that keeps changing.
What to bring forward
Do not wait for the next scheduled visit for anything new, bleeding or non-healing. Ring and be seen sooner.
Sun protection, permanently
Cover the treated area outdoors and protect sun-exposed skin generally. It lowers the chance of the next skin cancer.
For older patients, and for the adult children arranging all of this, one more thing is worth planning for early: how frailty, travel and other health conditions shape the schedule that is offered in the first place. That is set out in radiation for skin cancer in elderly and frail patients, which is the natural companion to this page.
Related reading
Radiation for Skin Cancer in Elderly and Frail Patients
How age, frailty, travel and other conditions change the schedule that is offered, and what to ask for.
When Is Radiation Used for Melanoma?A different skin cancer with different reasoning. Where radiation has a role, and where it does not.
Wound Healing Problems After Radiation to a LimbWhy skin over an arm or a leg heals more slowly, and what makes the difference at home.
Limb Stiffness and Function After RadiationKeeping a hand, arm or leg working when the treated area sits over or near a joint.
Radiation Therapy at CION Cancer ClinicsThe full radiation therapy hub - every safety, cost, scheduling and side-effect question in one place.
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Common questions
Skin Cancer Radiation — Your Questions Answered
How many sittings will I need for basal cell carcinoma radiation therapy?
There is no single number. Courses for basal and squamous cell skin cancers commonly run from about five sittings to around thirty, given on weekdays. Your radiation oncologist decides the schedule from the size, depth and site of the lesion, whether it is being given instead of surgery or after surgery, and how far you travel each day. Shorter schedules with fewer, larger sittings are often chosen for older or frail patients, and both NCCN and ASTRO recognise these as reasonable options. Each sitting itself takes only a few minutes. The appointment is usually fifteen to twenty minutes door to door.
Does radiation for skin cancer hurt?
The treatment itself is painless. You lie or sit still, the machine moves around you, nothing touches the lesion, and you feel nothing while the beam is on. What can become sore is the skin over the following weeks. In many patients the treated patch turns pink, then red, dry and itchy, and near the end of the course it may peel or weep. That soreness is the part people describe as painful, and it is managed with the dressings and skin care your radiation team prescribes. Report it at the weekly review rather than waiting. Skin reactions settle far more easily when they are caught early.
What will my skin look like after radiation for skin cancer?
Expect the treated patch to look different from the skin around it, permanently. During treatment it usually turns pink, then red and dry. It often peels or crusts in the last week and for one to two weeks after the course ends, because the skin reaction peaks after treatment finishes rather than during it. Healing normally takes four to eight weeks. In the longer term the patch may stay paler or darker, feel thinner, show fine visible blood vessels, and stop growing hair or sweating. No radiation oncologist can promise a particular cosmetic result, and you should be wary of anyone who does.
Is radiation as good as surgery for basal cell carcinoma?
They are different tools. Surgery is the first choice for most basal and squamous cell skin cancers, because it removes the lesion and gives a pathology report on the margins within days. Radiation is chosen when surgery is not suitable or not wanted: an eyelid, nose tip, ear or lip where closing the wound would be difficult, a very large lesion, a patient who cannot have an operation, involved margins after surgery, or nerve involvement. NCCN treats radiation as a primary option in those situations, and generally advises against it for people with a genetic condition that predisposes them to skin cancers. Ask your team why they are recommending one over the other for your lesion.
What is the follow-up after radiation for skin cancer?
Your first review is usually four to eight weeks after the last sitting, once the skin reaction has settled enough for the site to be assessed. After that, review is risk based. NCCN recommends regular skin examination for years afterwards, more often in the first two years when a recurrence is most likely to appear, then less often but lifelong. Each visit checks the treated patch, the rest of your skin and the nearby lymph nodes. Between visits you check your own skin monthly and use sun protection. Bring anything new, changing, bleeding or not healing to the appointment rather than waiting for the next scheduled one.
Am I radioactive after radiation for skin cancer?
No. External beam radiation and superficial radiotherapy leave nothing radioactive behind. The beam is switched on for a few minutes and switched off, and the moment you step off the couch you are safe to hold grandchildren, share a bed, cook for the family and travel on public transport. The one exception is internal radiation, where a sealed source is held against or inside the treated area for a set time. If that is what has been planned for you, your team gives you written precautions for that period. Ask which type you are having if you are not sure.