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Food intolerance post treatment?

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Food intolerance post treatment?

Hi everyone!

I was diagnosed with stage 3 in April 2020, and treatment from May to July of rad, chemo and brachy.  I've since returned with the all clear, however my bowels haven't really returned to any form of normality.  I've started to do a food diary, but was curious if developing food intolerances post treatment was a thing?

I used to be able to eat garlic by the bucket load, but over the last couple of months, each time I've consumed something with it in, I am terribly sick.  I'm also not sure if I'm intolerant to other foods, so I'm investigating that.  As you can imagine, it's frustrating, and embarrassing especially at work.  I'm grateful to the amazing treatment I received, and given a second change, but would love to reduce the impact my body has on myself and others.


Hi Mookii,

I'm definitely no expert but I'll tell you my experience of food intolerance since treatment. We probably received the same treatment of chemo, radio and brachy. I finished treatment in November 2019 and about 6 months later I realised that my body just did not react well to certain foods, fibre definitely being one of them. I started following an ibs diet (not completly) and it made a big difference. I am hoping to re-introduce foods back into my diet at some stage but at the moment my bowels react badly if I try. Sadly there are many, many food that I react to. High fibre cereals, beans, sweetcorn, onions, garlic, peppers, mushrooms, cucumbers, apples, pears, most seeds, brown bread, cabbage, lettuce!!! the list goes on. I do seem to be quite good with well cooked carrots, spinach, asparagas, most berries, oranges, bananas and all meats and fish. Potatoes are good but not in their skins so sadly no jacket potato with beans for me. I have recently had a colonoscopy where they found 10cm of radiotherapy damage to my sigmoid colon so I'm sure that doesn't help things. However, I will say that some of the problems I had initially like tenesmus and mucous in stool (which I thought would never go away) disappeared around the one year mark. My bowels are much better than they were at 6 months so their is light at the end of the tunnel. Changing my diet was a big turning point for me so I would say it is definitely worth a try. Good luck with it and let us know how you get on. 

x Maria

Diagnosed CC 01st August 2019 Stage 1b2 with 1 local lymph node involved.

Something else showed up on pet scan. Treatment delayed for surgery, done on September 9th. Found to be a simple ovarian cyst, 1 ovary and tube removed.

Treatment plan 5 chemo, 25 extended field radio and 4 brachy. Treatment start date 02nd October 2019. Treatment end date 8th November.

February 2020 3 month scans NED

August 2020 9 Month scans NED

February 2021 15 Month scans NED

Extensive bladder damage seen on mri and damage to sigmoid colon.



Southofthelake's picture

I found that i can't eat bounty bars anymore, i think there are other foods that cause issues, but i have not been documenting them at all. 

October 2019 - smear test

November 2019 - results back; hpv with severe dyskaryosis, colposcopy organised.

November 2019 - colposcopy, biopsied - confirmed abnormal cells

December 2019 - lletz done

Jan 2020 - confirmed cancer

Feb - confirmed stage 2b CC (updated info, staging changed to stage 3 invlving lymph nodes)

Treatment start March - 28 external radio/5 chemo/4 brachy

April 25th - finished brachy

July 2020 - MRI

Aug - confirmed cancer in lymph node

Sept 2020 - lymphadenectomy (unsuccessful)

Nov 2020 - PET scan - confirmed metastatic cancer -cyberknife denied - chemo only option


A friend of mine went through breast cancer treatments and has now developed an allergy to seafood and get viiolently sick now.


Hi all,

Seems like most of us have gone much more sensitive to foods. I finished my chemo, radio and brachy in 2015 and I have tried my best to look after myself but I'd feel that my bowels have periods of worse and lots of times my brain/ nerves triggered diarrhea. Or kind of IBS feeling, irritation, urge. There is ocassionally bits of blood or mucus which I've been told is normal reaction with post radiation entiritis. Do you experience the same?

I also have another condition, histamine allergies and that is discovered recently so  my life could have been easier if I knew about it.

I want to ask if anyone had a food poisoning (it was rice), and would have a problem to recover? I'm going for some tests hopefully soon but it's been a month and not able to get back to normal.

Thank you guys.


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Moving forward from a cancer diagnosis