Keeping a Side Effect — Diary

Call your oncology team the same day — do not wait for your next appointment. A diary is for tracking symptoms over time; it is not a reason to delay reporting something that is escalating. If you cannot reach your team, or if you have a high fever, are unable to keep fluids down, or have severe pain, go to a hospital emergency department. Write what happened in the diary as well, because that record will help your team when they assess you.

Any notebook works. A plain exercise book with one page per day is enough. Some cancer centres provide printed diary sheets with prompts built in — ask at your next appointment whether one is available. If you prefer your phone, symptom-logging apps are an option, as long as you can show or share the record at appointments. The most important thing is that you will actually use it, so choose whatever method is easiest to keep up.

Keep writing throughout your treatment course. Some side effects — particularly nerve-related ones such as tingling or numbness — can appear or worsen weeks after a cycle ends, so recording during treatment breaks is worthwhile. After treatment finishes, ask your oncologist how long to continue. The record you have built is also useful at follow-up appointments months later, if a new symptom raises a question about what happened during treatment.

This is a common concern, and it is worth taking seriously. Brief factual recording — a few lines noting what you observed — is different from dwelling on symptoms. Most people find that writing gives them a sense of doing something useful rather than adding to anxiety. If you find that recording symptoms is increasing distress, tell your oncology nurse or ask about counselling support. Managing the emotional weight of treatment is part of your care, not separate from it.

Yes, and it is one of the most useful things you can bring. A second opinion is more informative when the reviewing oncologist can see how you actually responded to treatment — which side effects appeared, how severe they got, and how they were managed. A diary of documented observations is more reliable than memory. You can share the pages since your last treatment if bringing the whole record feels too much.

Use simple descriptions rather than medical terms — 'my hands feel like they are asleep', 'my mouth feels raw', 'I am too tired to stand up' are all useful. Your oncology team will ask follow-up questions at your appointment to understand exactly what you mean. A photograph is also a legitimate way to show something hard to describe — a rash, a swollen area, a mouth sore. What matters most is that you record that something changed, and roughly when.