Radiation therapy can cause dryness, redness, and sensitivity in the treated area, known as radiation dermatitis. Gentle daily washing, fragrance-free moisturising and consistent sun protection are the most evidence-based ways to support your skin. This hub brings together practical, evidence-based guidance for skin care before, during and after radiotherapy.
Radiation Therapy Skin Care Hub
If you’re about to start radiotherapy, or you’re already partway through treatment and noticing your skin change, this is one of the most common and most manageable side effects of cancer treatment. Most people treated with radiotherapy experience some degree of skin reaction in the treatment area, and for the great majority, it is mild, predictable, and responds well to simple, consistent care.
This hub brings together evidence-based guidance on preparing your skin before treatment starts, caring for it day to day during your course, and supporting recovery once treatment ends, alongside practical answers to the questions patients ask most often.
Every guide reflects the CanScience approach: evidence-based, compassionate, practical, and free from unnecessary complexity.
What Is Radiation Dermatitis?
Radiation dermatitis is the medical term for the skin changes that can develop in the area being treated with radiotherapy. It happens because radiation affects the fast-dividing cells in the outer layers of the skin within the treatment field, alongside the cancer cells it’s targeting.
Reactions are usually graded on a simple scale, from mild redness and dryness (the most common experience), through to more noticeable redness with some peeling, and, less commonly, areas of moist, broken skin, particularly in skin folds or areas of friction. Most people stay in the mild-to-moderate range with good supportive care.
Skin changes typically begin one to three weeks into a course of treatment, and often continue to worsen for a further ten to fourteen days after the final session before starting to heal. This pattern is well documented and expected, it does not mean something has gone wrong.
How Radiation Therapy Affects the Skin
Think of the outer layer of your skin as a wall that is constantly being rebuilt from underneath, with new cells replacing older ones on a steady cycle. Radiotherapy temporarily slows that rebuilding process in the treatment area, which is why the skin there becomes thinner, drier and more reactive than skin elsewhere on the body.
How noticeable this is varies between people. Treatment dose, the area being treated, skin folds or friction points within the field, and individual factors such as skin type all play a role. This variation is normal, and it’s one of the reasons your radiotherapy team will check your skin regularly throughout your course.
Because this pattern is predictable, it can also be prepared for. Starting a simple, gentle skincare routine from the beginning of treatment, rather than waiting for irritation to appear, is one of the most useful things you can do.
The CanScience Approach to Radiation Skin Care
CanScience was developed specifically for the skincare needs of people living with sensitive and compromised skin, particularly during and after cancer treatment, in collaboration with oncology and dermatology professionals. Rayon Gel and Body Repair Cream were developed with treatment-affected skin in mind, including the needs of patients undergoing radiotherapy.
The guidance in this hub reflects accepted clinical practice and the current evidence on radiotherapy skin care. Where the evidence is still developing, or where practice varies between treatment centres, this is acknowledged rather than glossed over. Every article encourages you to check specific product timing and technique with your own radiotherapy team, since protocols can differ slightly between centres.
The CanScience Radiation Skin Care Principle
Wash gently, every day. Moisturise consistently, following your own centre’s guidance on timing. Protect the area from the sun. And tell your care team as soon as anything changes.
Explore the Radiation Therapy Skin Care Hub
Each article below addresses a specific stage or question within radiotherapy skin care. If you are preparing to start treatment, begin by understanding radiation dermatitis and preparing your skin beforehand; if you are already in treatment, the washing, redness, and post-treatment guides will be most useful.
Understanding Radiation Dermatitis
Understanding Radiation Dermatitis
Preparing Your Skin Before Radiotherapy
Preparing Your Skin Before Radiotherapy
Washing and Showering During Radiation Therapy
Washing and Showering During Radiation Therapy
Managing Redness and Irritation During Radiotherapy
Managing Redness and Irritation During Radiotherapy
Caring for Your Skin After Radiation Therapy
Caring for Your Skin After Radiation Therapy
What Helps During Radiotherapy
Practice | Why it helps |
|---|---|
| Daily gentle washing | Washing with lukewarm water, with or without a mild soap, has been shown in clinical evidence to lower the risk of more severe skin reactions and moist desquamation. |
| Fragrance-free, basic moisturiser | Started from the beginning of treatment, this is the most consistently recommended step for comfort and barrier support. |
| Loose, soft, natural-fibre clothing | Cotton, linen or silk over the treatment area reduces friction against sensitive skin. |
| Mineral sunscreen (SPF50 once healed) | Recommended once your course of treatment finishes, to protect the area while it continues to recover. |
| Patting the skin dry | Rubbing can irritate skin that is already more fragile than usual; patting gently is the more comfortable option. |
What to Be Mindful Of
Ingredient or habit | Why it's worth caution |
|---|---|
| Ingredient or habit Alcohol, menthol, added fragrance or preservatives | These lack good supporting evidence for radiotherapy skin and carry a higher irritation risk on already sensitised skin. |
| Aloe vera | Current evidence does not support a protective benefit specifically for radiation dermatitis, despite its popular reputation. |
| Calendula-based products | Earlier trials suggested a possible benefit, but more recent reviews report mixed results. Discuss timing and use with your radiotherapy team before starting one. |
| Waxing, hair removal creams, laser hair removal | Best avoided on the treatment area for the duration of your course, since they can further irritate already sensitive skin. |
| Very hot water or vigorous scrubbing | Heat and friction can aggravate a treatment area that is already more reactive than usual. |
Building a Skin Care Routine During Radiation Therapy
Four Principles for Radiotherapy Skin Care
Wash daily with lukewarm water, gently. Moisturise consistently, with a fragrance-free product, checking your centre’s guidance on timing relative to treatment. Protect the area from friction and, once healed, from the sun. Watch and report, so any change is seen early by your care team.
One detail worth flagging clearly: some radiotherapy centres ask patients not to apply cream in the hours immediately before a session, and to moisturise afterwards instead, while others have no such restriction. There isn’t one universal rule here, so always follow the specific instructions your own treatment team gives you rather than general guidance found online.
Radiation Therapy Skin Care Frequently Asked Questions
Can I shower during radiotherapy?
Yes. Daily washing with lukewarm water, with or without a mild soap, is recommended during radiotherapy. Evidence shows regular gentle washing lowers the risk of more severe skin reactions rather than increasing it.
Can I use moisturiser before my radiotherapy session?
This depends on your treatment centre’s protocol. Some teams ask patients not to apply cream in the hours before a session and to moisturise afterwards instead. Always follow the specific instructions given by your own radiotherapy team.
Can I wear deodorant during radiation therapy?
Current guidance generally permits deodorant use during radiotherapy provided the skin in the treatment area is not broken. Practice can vary between centres, so it is worth confirming with your own treatment team.
How long does redness from radiotherapy last?
Skin reactions typically begin one to three weeks into treatment and often continue to worsen for ten to fourteen days after the course finishes, before gradually improving over the following weeks to months.
When should I contact my care team about my skin during radiotherapy?
Contact your radiotherapy or oncology team if the skin becomes broken, weeps, blisters, or shows signs of infection such as increasing pain, warmth, spreading redness or discharge.
Key Takeaways
Some degree of skin reaction is common during radiotherapy, and for most people it stays mild and manageable. Gentle daily washing has been shown to reduce the risk of more severe reactions, so there’s no need to avoid the area. A simple, fragrance-free moisturising routine from day one is the most consistently evidence-based step you can take. Product timing before sessions varies by centre, always follow your own team’s instructions. Contact your care team promptly if skin breaks down, weeps or shows signs of infection.
Medical Disclaimer: The information in this hub is for educational purposes only and does not constitute medical advice. It is not a substitute for professional medical guidance and is not intended to diagnose, treat, cure or prevent any condition. Product timing and technique can vary between radiotherapy centres. Always consult your oncologist, radiation therapist or healthcare team before making changes to your skincare routine during treatment.
