The short explanation
Chemotherapy can lower the body's ability to fight infections, so families can help a lot with simple precautions. Good handwashing for everyone at home, keeping visitors with colds or fever away, freshly cooked and well-heated food, clean drinking water, washing fruits and vegetables well, and avoiding raw or undercooked meat and eggs are commonly advised. The most important thing to know is when to call the hospital. A fever during chemotherapy can be serious and needs prompt attention. Ask the oncology team for a clear plan: what temperature to act on, which number to call, and where to go out of hours. It is completely fine to ask them to repeat or write down advice that was not explained clearly.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Appetite often drops during chemo. Small, frequent meals and foods he enjoys can help. A hospital dietitian can give specific advice.
- Mouth ulcers, nausea, constipation or diarrhoea are common side effects; the team can suggest ways to manage them.
- Keep a notebook of symptoms, temperatures and questions to bring to each visit.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot replace advice from your father's oncology team, which knows his treatment and risks.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- What temperature should make us call you, and on which number?
- Which foods should he avoid during treatment?
- How can we manage his nausea and mouth ulcers?
- When are his blood counts expected to be lowest?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 or go to emergency immediately if he has fever with shivering, difficulty breathing, confusion or is very drowsy.
Get help the same day
- Contact the oncology team the same day for any fever, vomiting that does not stop, or diarrhoea.
Raise it at a routine appointment
- Bring your notebook of symptoms and questions to every chemotherapy visit.
Sources
The evidence this explanation is built on.
- Cancer — signs and symptoms NHS
- Colorectal cancer National Cancer Institute (NIH)
- Lung cancer National Cancer Institute (NIH)
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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