The short answer
This guide helps you turn the oncology team's instructions into one written plan for monitoring, routine calls, urgent calls, and emergencies. It is a planning tool, not an individual medical, legal, or coverage decision.
The main goal is to turn the oncology team's instructions into one written plan for monitoring, routine calls, urgent calls, and emergencies.
List the symptoms your treatment can cause and how the team wants them measured.
Record daytime and after-hours numbers.
Write the team's exact thresholds and actions rather than inventing your own.
On this page
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The whole article, with every detail and caution.
Same-day call, or emergency care?
Your team sets this line, so ask them to draw it explicitly. Which of these means calling you, and which means going straight to the emergency department? NCI is clear that infections during treatment can be life-threatening and require urgent medical attention, and that fecal impaction and bowel obstruction require immediate medical care. If your team has told you to go to the emergency room for fever, go. Do not wait for a callback. Tell the front desk you are on cancer treatment.
This page cannot diagnose a symptom or set an emergency threshold for you. Follow your team's written instructions. Do not change prescribed medicines, treatment, activity limits, devices, or wound care on your own.
If someone may be in immediate danger, call 911. For thoughts of suicide or self-harm, call, text or chat 988, the 988 Suicide and Crisis Lifeline.
What this page helps you do
A symptom and call plan is one page that answers a single question before you need it. This is happening: who do I call, and how fast? Below is how to build one, with the signs the National Cancer Institute (NCI) and CDC publish. Your own team's instructions always come first.
Step 1: Ask your team the one question that fills in the blanks
NCI suggests asking your care team directly: "What symptoms or problems should I call you about?" Ask before treatment starts, and again whenever a drug changes. Write the answers in your team's own words, including any numbers. Their instructions may be stricter than anything published, because they know your counts, your drugs, and your history.
Step 2: Write down the published thresholds
Most of these come from NCI's side-effect pages. Copy the ones that apply to your treatment, and ask your team to check them.
Fever and infection. NCI says to call your health care team if you have signs of infection. It warns that infections during cancer treatment can be life-threatening and require urgent medical attention.
Write the fever number at the top of your page. CDC says: "Call your doctor immediately if you have a temperature of 100.4°F (38°C) or higher." MedlinePlus uses the same number. CDC explains that during chemotherapy a fever may be the only sign of a serious infection. Keep your team's daytime and after-hours numbers next to it.
Ask your team whether they want you to call at a different temperature for you, and write their answer down. If you are unsure, call.
The other signs of infection NCI lists: chills; cough or sore throat; diarrhea; ear pain, headache or sinus pain, or a stiff or sore neck; skin rash; sores or white coating in your mouth or on your tongue; swelling or redness, especially where a catheter enters your body; urine that is bloody or cloudy, or pain when you urinate.
One more instruction belongs on your page in full. NCI says to talk with your doctor or nurse before taking medicine, even aspirin, acetaminophen (such as Tylenol), or ibuprofen (such as Advil), for a fever. These medicines can lower a fever but may also mask or hide signs of a more serious problem. Take your temperature first, and tell your team the number.
Bleeding. NCI says to call your doctor or nurse for bleeding that does not stop after a few minutes; bleeding from your mouth, nose, or when you vomit; vaginal bleeding when you are not having your period; urine that is red or pink; stools that are black or bloody; or period bleeding heavier or longer than normal. Also call for bad headaches or changes in how well you see, or if you feel confused or very sleepy.
Constipation. NCI says to tell your doctor or nurse if you are having constipation, so you can get treatment as soon as possible. It lists two or fewer bowel movements in one week as a sign. It warns that chronic constipation can lead to fecal impaction or bowel obstruction, two potentially life-threatening conditions that require immediate medical care.
Pain. NCI says to contact your doctor or nurse if you feel new pain, if your pain is not decreasing or going away with pain medicine, or if you have side effects from the pain medicine.
Swelling in an arm or leg. NCI says to contact your doctor if you notice heaviness, swelling, or other signs of lymphedema. Call right away if you have a fever or other signs of cellulitis: pain, tenderness, redness, and swelling, with skin that feels warm to the touch.
Diarrhea. NCI says to tell your doctor or nurse if you are having diarrhea. It gives one figure worth writing down: grades 3 and 4 diarrhea, meaning "seven or more bowel movements above your normal daily number," "can be life-threatening and may require treatment in a hospital." Ask your team for the number they want you to call at, and write it down.
Step 3: Find your after-hours number now, not later
Daytime and after-hours numbers are often different. Ask the clinic for both. Ask who answers after hours, how long a callback takes, and what to do if none comes. The number is often on your discharge paperwork, appointment card, or patient portal. Write it where it does not depend on a charged phone.
Step 4: Have this ready before you dial
- Diagnosis, current treatment, and the date of the last dose.
- Your temperature, taken just before calling.
- The symptom: what it is, when it started, and what has changed.
- A current list of medicines, doses, and allergies.
- Your pharmacy, and the hospital you would go to.
- A pen. You will be given instructions.
Step 5: Track what you will be asked about
NCI suggests keeping a record of your bowel movements, so your team can see what is normal for you. For pain, NCI describes rating it on a scale of 1 to 10, where 10 is the most pain and 1 the least. It suggests writing down your pain levels and the medicine you took, using a notebook, a chart from your nurse, or a phone app. A few dated notes are easier than trying to remember during a call.
Sources
- National Cancer Institute — Side Effects of Cancer Treatment
- National Cancer Institute — Infection and Neutropenia During Cancer Treatment
- National Cancer Institute — Bleeding and Bruising (Thrombocytopenia)
- National Cancer Institute — Constipation
- National Cancer Institute — Cancer Pain
- National Cancer Institute — Lymphedema
- National Cancer Institute — Diarrhea
- National Cancer Institute — Nausea and Vomiting
- Centers for Disease Control and Prevention — Fever and Cancer Treatment
- 988 Suicide & Crisis Lifeline
- MedlinePlus (National Library of Medicine) — Cancer treatment: preventing infection

Common questions
What temperature counts as a fever during cancer treatment?
CDC says to call your doctor right away if you have a temperature of 100.4°F (38°C) or higher during chemotherapy. MedlinePlus uses the same number. Ask your team whether they want you to call at a different temperature, and write their answer on your plan. If you are unsure, call.
Should I take something for a fever before I call?
No. NCI says to talk with your doctor or nurse before taking medicine, even aspirin, acetaminophen or ibuprofen, for a fever. These medicines can lower a fever but may also mask signs of a more serious problem. Take your temperature first, then tell your team the number.
How do I know whether to call or go straight to the emergency department?
Your team draws that line, so ask them to draw it explicitly. NCI says infections during treatment require urgent medical attention, and that fecal impaction and bowel obstruction require immediate medical care. If your team has told you to go to the emergency room for fever, go, and tell the front desk you are on cancer treatment.
Which bleeding symptoms mean calling?
NCI says to call for bleeding that does not stop after a few minutes, bleeding from your mouth or nose or when you vomit, vaginal bleeding outside your period, red or pink urine, black or bloody stools, and periods heavier or longer than normal. Also call for bad headaches, changes in how well you see, or feeling confused or very sleepy.
What should I have in front of me before I dial?
Your diagnosis, current treatment and the date of your last dose. Your temperature, taken just before calling. The symptom, when it started and what has changed. A current medicine list with doses and allergies, your pharmacy, the hospital you would go to, and a pen, because you will be given instructions.
Questions to ask your doctor
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Your next step
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Get urgent help
Fever of 100.4°F (38°C) or higher during chemo, severe pain, or trouble breathing: call your cancer care team right away, day or night. Call 911 for an emergency.
Plain-language explanation of the published sources cited on this page. AI-assisted, source-checked, not clinician-reviewed.
Sources last checked: 2026-09-27 what this meansLast updated: 2026-09-27Next planned review: 2027-01-22
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status — Source checked. This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
High-risk topic — talk to your care team. This topic can involve urgent, individual medical decisions. This page is general education only: it cannot tell you whether your situation is an emergency or what you personally should do. Follow your oncology team's instructions and contact them for individual guidance.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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