Fever in a Child on Chemotherapy — What to Do Right Now
A fever in a child on chemotherapy is a medical emergency until your oncology team says otherwise. Do not wait to see if it comes down — call your team or go to hospital immediately.
Medically reviewed by Dr. Bharati Devi Gorantla, Medical Oncologist, MBBS · MD · DM (Adyar, Chennai) · ECMO · MRCP SCE (UK) · Last reviewed September 2026
- Do not wait — Giving paracetamol and watching at home does not make your child safer — it delays the treatment they need.
- White blood cells are low — Chemotherapy reduces the cells that fight infection. A small infection can become dangerous within hours.
- Say this first at triage — Tell the nurse immediately that your child is on chemotherapy — before describing the symptoms.
- You are not overreacting — Going in and being told it is fine is the right outcome. Waiting at home is the risk.
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A fever in a child on chemotherapy is a medical emergency until your oncology team says otherwise. Chemotherapy lowers the white blood cells that fight infection, so bacteria that are harmless in a healthy child can become life-threatening within hours. Call your team or go to hospital now — do not wait to see if the fever settles.
If a symptom below applies to you, do not wait for a callback. Call 1800-202-8726 or go to your nearest emergency department.
What to do on the way to hospital
- Say this to triage first: 'My child is on chemotherapy and has a fever.'
- Bring your child's oncology card or hospital treatment summary.
- Note which hospital manages your child's treatment and the name of their oncology team.
- Note when chemotherapy was last given, so you can tell the emergency doctor.
- Do not give paracetamol before your child is assessed — it lowers the fever reading and can hide how unwell they are.
- Go directly. Do not stop to buy medicine on the way.
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Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
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MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
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MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
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Not sure whether this counts as an emergency?
Call the helpline. It is always better to check than to wait.
How is a fever in a child on chemotherapy different?
| Feature | Healthy child | Child on chemotherapy |
|---|---|---|
| Any fever | Often safe to monitor at home for a day | Go to hospital — today, not tomorrow |
| Shivering or shaking | Occasionally happens, usually settles | Red flag — go now |
| Pale and very tired with fever | Watch for a few hours | Go now — do not wait |
| No other symptoms alongside fever | Often a virus, can manage at home | Still an emergency — white cells may be critically low |
| Redness near a line or port | Unlikely to be serious | Go now — possible line infection |
| Typically starts | Resolves within a few days | Most often in the days following a chemotherapy cycle, but can happen at any point during treatment |
Is it safe to send your child to school or playgroup?
When your child's white blood cell count is low, school and playgroups carry a real risk. Your oncology team will tell you when counts are low enough that mixing with other children is unsafe — this changes cycle by cycle.
Avoid contact with anyone who is unwell. Tell your child's school that if a classmate develops chickenpox, measles or any illness caused by a live virus, your team needs to know the same day.
Your child should not receive live vaccines while on chemotherapy. Siblings and close contacts should also avoid certain live vaccines during this period — ask your team which ones are affected.
Most children can return to school between cycles once counts have recovered. Your team will confirm when that is safe for your child specifically.
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Frequently asked questions
What temperature counts as a fever for my child on chemotherapy?
Your oncology team will have given you a specific number to watch for, and that is the one to follow. What matters most is this: if your child feels feverish to you, or has any reading that is clearly above their normal, treat it as an emergency rather than waiting for the reading to go higher. During chemotherapy, acting early is always safer than waiting at home. If you are unsure, call your team immediately rather than deciding alone.
If paracetamol brings the fever down, can we wait at home?
No. Paracetamol lowers the fever reading but does not treat the infection underneath it. Your child may seem more comfortable for a few hours while the infection continues to develop — and this is one of the most common reasons families arrive at hospital later than they should. A fever that settles with paracetamol during chemotherapy still needs assessment today. The medicine is not the same as being safe.
What will happen when we arrive at hospital?
Tell triage your child is on chemotherapy and has a fever — say this before anything else. Most hospitals have a specific protocol for this, and your child should be seen quickly rather than waiting in a general queue. The team will take blood tests to check the white blood cell count and look for signs of infection. Depending on the results, your child may need to stay in and be monitored closely. Bring your oncology team's contact details so the emergency doctor can speak to them directly.
How long does neutropenia last, and when is my child most at risk?
The period of lowest white blood cell count typically falls in the days following a chemotherapy cycle, though the exact timing depends on which medicines your child is receiving. Your oncology team can tell you when the low point is expected in your child's specific treatment plan. Counts usually recover as the next cycle approaches, but they can vary from cycle to cycle. Your team may check blood counts regularly to track this — those results tell you when the highest-risk window is.
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