Has anyone noticed their body smells different after radiotherapy ?
Is it a recognised side effect and does it go away ?
Although we take care to ensure accuracy, Macmillan Cancer Support does not accept liability for the information and materials provided or referenced in Ask an Expert or for any errors or omissions in them, or for third-party information or services such as other websites we may link to. The information and materials provided or referenced in Ask an Expert are for information purposes only and are not intended to be legal, financial or medical advice or opinions. If you need more details on your rights, please contact a financial, legal or other appropriate adviser.
We recommend that you consult your doctor if you are concerned about your health. Any You should not rely on any information and materials provided or referenced in Ask an Expert including by our Experts as they are not a replacement for advice, diagnosis or treatment from your medical team, and our Experts cannot provide a second opinion to that of your medical team.
Your question can be read by others – so please don't post your contact details or any other information that could personally identify you. Please read our Terms and Conditions and Community Guidelines for more details.
Has anyone noticed their body smells different after radiotherapy ?
Is it a recognised side effect and does it go away ?
Hi Evolve
Thanks for getting in touch and welcome to the online community.
I can see you have joined number of groups on the online forum. I hope you’re finding it helpful talking to others.
My name is Paula and I am one of the Cancer Information Nurse Specialists on the Macmillan Support Line.
Sorry to hear your experiencing a change in your body odour after your Radiotherapy. The side effects of cancer treatment can be difficult and sometimes you may feel you’re the only one experiencing these effects.
It’s not usual to become more sensitive to smells whilst having cancer treatment. These changes can occur before, during and after cancer treatments have finished. Some people have reported a pungent, chemical chlorine smell and changes in their body fluids. It’s considered a phenomenon and the cause remains unclear.
Therefore finding ways to manage this hypersensitivity to smells can be challenging. The odour may disappear by itself, or it may need further management input from your breast care nurse or cancer team. We would recommend speaking to them about it to make sure it’s not an infection causing the odour.
You may find the Breast Cancer Now and Forum useful to look at. As other people have posted questions on this concern also.
I hope this information is helpful. If you have any further questions, please get in touch by email, webchat or phone. The Macmillan Support Line offers practical, clinical, financial, and emotional support. You can call us free from landlines and from most mobile phone networks* on 0808 808 00 00, 7 days a week, 8am – 8pm.
Ref: VG/PW
Whatever cancer throws your way, we’re right there with you.
We’re here to provide physical, financial and emotional support.
© Macmillan Cancer Support 2025 © Macmillan Cancer Support, registered charity in England and Wales (261017), Scotland (SC039907) and the Isle of Man (604). Also operating in Northern Ireland. A company limited by guarantee, registered in England and Wales company number 2400969. Isle of Man company number 4694F. Registered office: 3rd Floor, Bronze Building, The Forge, 105 Sumner Street, London, SE1 9HZ. VAT no: 668265007