The short answer
A diary turns vague recollection into something a clinician can act on. NCI describes recording where a symptom is, what it feels like, whether it comes and goes, how severe it is on a scale of 1 to 10, what makes it better or worse, and how it affects eating, sleep and mood. Some people use a notebook, a chart from the nurse or a phone app.
NCI asks patients to describe location, quality, pattern, timing and severity of pain.
The severity scale NCI uses runs from 1 to 10, where 10 is the most pain and 1 the least.
Record what makes a symptom better and what makes it worse.
Note the effect on eating, sleeping, exercise, other activities and mood.
On this page
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The whole article, with every detail and caution.
This page is for people with cancer and their caregivers. It explains how to keep a simple symptom diary that helps your care team.
Memory is a poor witness
Three weeks of ordinary life blur together. Asked in clinic how things went, most people say something like "not too bad, a few rough days." That is honest, but it gives the team little detail.
A diary fixes that. It turns a fog into a pattern the team can read.
The questions your notes should answer
NCI's guidance on cancer pain lists what clinicians want to know. Use it as your template, and it works for symptoms beyond pain too:
- Where is it?
- What does it feel like — sharp, burning, shooting or throbbing?
- Does it come and go, or is it there all the time?
- When did it start, and how long does it last?
- How bad is it on a scale of 1 to 10, where 10 is the most pain and 1 the least?
- What makes it better, and what makes it worse?
- How is it affecting eating, sleeping, exercise and other activities?
- How is it affecting mood and mental health?
Answer those in a few words each and you have a usable entry.
Tie the number to the medicine
NCI describes the practical version people actually use: writing down levels of pain and the medicine taken for it, in a notebook. Keeping those two things side by side helps the team judge the medicine.
A score before and after a dose can show whether the medicine is helping.
Score, medicine, time. Everything else is a bonus.
Choose a format you will keep up
NCI mentions three routes: a notebook, a chart you can ask your nurse for, or a pain app on your phone. None is better than the others in principle. The one that gets filled in is the good one.
If you are the caregiver rather than the patient, agree who writes what. One shared notebook avoids two half-records.
Bring the pattern, not the pile
Long notes are hard to review in a short visit. Before a visit, spend five minutes pulling out what changed: the worst days, anything new, anything that stopped working, anything that started interfering with sleep or eating.
Your diary can also be a source for the questions you bring.
What the tracking is for
NCI says pain is not something you have to "put up with." Its pain guidance says to contact your care team about new pain, pain that is not decreasing or going away with pain medicine, or side effects from the medicine. Do not wait for the next appointment to report these.
A diary makes that conversation faster and more precise. Instead of an impression, you arrive with evidence — and the team can change something on the strength of it.
Two habits that make it stick
Pick a fixed moment each day rather than relying on remembering. An evening habit may work if the notebook sits beside the medicines.
And keep it short enough to survive a bad week. A short record kept up is more useful than a detailed one that stops.
Sources
National Cancer Institute, Pain (side effects), "Describing pain to your doctor", checked 2026-10-02.
Common questions
How detailed does a diary need to be?
NCI describes people writing down their levels of pain and the medicine they took for it in a notebook.
Does mood belong in a symptom diary?
NCI's guidance on describing pain includes its effect on mood and mental health, alongside its effect on eating, sleeping and activity. Those effects are part of what the team is treating.
Is there an app for this?
NCI notes that a pain app on a phone is one of the options people use, along with a notebook or a chart obtained from a nurse. It does not endorse a particular product.
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.
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Where to get help with this, by name
A hospital social worker or financial navigator is the best first call if you have one. If you do not, these organisations help at no cost to you.
- Patient Advocate Foundation — (800) 532-5274. Case managers take on insurance appeals, denials and medical debt with you. Free.
- TotalAssist (Patient Advocate Foundation's copay programme, merged with the PAN Foundation in 2026) — 866-512-3861. Help with medication copays, coinsurance and deductibles, insurance premiums, and office-visit and administration charges on the day of treatment, across nearly 150 conditions.
- CancerCare — 800-813-HOPE (4673). Oncology social workers, free counselling and support groups. Limited financial help with transport, home care, child care and lodging for people in active treatment who meet their income guidelines — funding is first-come, first-served, so call to ask what is open.
- Triage Cancer — 424-258-4628. Free legal and financial navigation: insurance, employment rights, disability.
- Blood Cancer United (formerly the Leukemia & Lymphoma Society) — (800) 955-4572. Information Specialists answer questions on treatment, insurance and financial problems.
- HealthCare.gov — 1-800-318-2596. For questions about the external review process — the independent review your insurer is required by law to accept.
Your state Department of Insurance regulates insurers and takes consumer complaints. On Medicare, your State Health Insurance Assistance Program (SHIP) gives free one-to-one counselling. If a specific drug is the problem, ask the manufacturer about its patient assistance programme.
Phone numbers checked 31 July 2026. Programmes and eligibility change — if a number has moved, please tell us.
Plain-language explanation of the published sources cited on this page. AI-assisted, source-checked, not clinician-reviewed.
Sources last checked: 2026-10-02 what this meansLast updated: 2026-10-02Next planned review: 2027-08-11
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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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