Medical Symptom Diary: What to Record for Your Doctor
When your doctor asks when a symptom started or how often it happens, it can be surprisingly difficult to remember. Did it begin last week or the week before? How long did it last? Did it interrupt your sleep or stop you doing something?
A medical symptom diary records those details while they are fresh. It does not need to be complicated or use medical language. A few clear, dated notes can help you explain what you experienced and prepare questions.
A symptom diary is an organisational tool, not a way to diagnose yourself.
What is a medical symptom diary?
A medical symptom diary is a dated record of symptoms and health changes. It can include when a symptom happened, how long it lasted, how often it occurred and how it affected everyday activities.
The purpose is to record your experience, not decide what caused it. “I felt light-headed while standing in the kitchen and needed to sit down” is clearer than “I felt strange” and avoids assuming the cause.
You do not need to know the medical name for a symptom. Use your own words and be as specific as you reasonably can.
The Victorian Government’s Better Health Channel guidance on preparing for a medical appointment recommends writing down when symptoms started, when they happen, how long they last, how often they occur, what seems to make them better or worse, and whether they stop you doing anything.
What to record in your medical symptom diary
A useful entry answers a few practical questions. Focus on information that may otherwise be forgotten.
Date, time and duration
Write down the date and approximate time. If recording it later, “around 2 pm” or “during the night” is better than guessing an exact time.
Note whether it is new or something you have experienced before, how long it lasted and whether it returned.
What you noticed and where
Describe what the symptom felt like and where you noticed it. Descriptions such as aching, tight, burning, itchy or unsteady are clearer than “felt bad”.
Be clear about the location. “Aching in my right knee” is more specific than “sore leg”. If the location changed, record that as an observation rather than trying to explain it.
How it affected your day
Record whether you continued, slowed down or stopped what you were doing. Note if it disturbed sleep, affected appetite, interrupted your usual walk or meant you needed help.
This records the symptom’s practical impact.
Relevant context, without assuming a cause
Note relevant context, such as an activity, meal, routine change, disrupted sleep or recently changed medication.
Keep the observation separate from the conclusion. “Felt dizzy approximately one hour after taking my medication” records timing. “The medication caused dizziness” makes a conclusion that should be discussed with your doctor or pharmacist.
Note what seemed to make it better or worse, without treating the pattern as proof.
Questions you want to ask
Leave space for questions that arise between appointments. Put the most important questions first.
You might write: “If this happens again, what details would you like me to record?” or “Should I continue keeping this diary, and for how long?” Healthdirect also recommends taking questions and a written list of medicines to appointments in its questions to ask your doctor guide.
How to write clear symptom diary entries
A simple format makes a medical symptom diary easier to maintain:
- Date and approximate time
- Symptom and location
- Approximate duration or frequency
- What you were doing at the time
- Effect on your usual activities
- Any relevant change or question to discuss
For example:
Monday, approximately 2 pm. Aching in my right knee after walking to the shops. Lasted around 20 minutes. I stopped walking and sat down. Carrying the shopping home was uncomfortable.
This dated entry records the experience without trying to explain its cause.
If you are keeping notes for someone else, distinguish between what the person tells you and what you personally observe. “Mum said she felt dizzy” is different from “I noticed Mum needed to sit down while making breakfast”.
Make the note soon after the event where possible. If not, state that the time or duration is approximate.
Using the My Medical Folder Observation Chart
My Medical Folder was created from caring for my sister and mother through serious illness.
The Observation Chart also proved useful when my mother experienced chest pain. After calling an ambulance, I recorded what she was feeling, when symptoms occurred, changes in her skin’s appearance and readings such as blood pressure. I could then hand those dated observations to the paramedics.
Recording information must never delay calling Triple Zero (000), following the operator’s instructions or providing care. Only take measurements if it is safe, you know how to use the equipment and it will not delay help.
The chart takes some of the thought process out of deciding what to record. In the Extras section of My Medical Folder, it has space for the date, symptoms, appearance, breathing, notes and readings such as temperature, blood pressure, heart rate, oximetry and blood sugar.
You do not need to complete every field. Use only the sections relevant to your circumstances, and follow your healthcare professional’s instructions about whether any measurements should be taken, which device to use and how to record them. The chart organises information. It does not interpret readings or replace professional advice.
In the notes area, add duration, context and effects on daily activities. The Included Printable Resource Library contains the Observation Chart and other printable health tracking resources.
Preparing your records for an appointment
Before your appointment, read through the diary and mark the entries you most want to discuss. For several pages, prepare a short summary of when the main symptom began, its frequency and its impact.
Bring the notes with an accurate current medication list and any reports or correspondence requested by the clinic. Australian Government medication management guidance encourages people taking medicines to maintain an up-to-date list that is accessible to them and those involved in their care.
Clearly label the current medication list. Where known, include names, strengths, prescribed doses, timing, reasons, prescribing doctors and recent changes. Add over-the-counter medicines, vitamins, supplements and known medicine allergies. Check uncertain details with your doctor or pharmacist.
For ongoing investigations or conditions, consider keeping the original significant report, current diagnosis or specialist report, and two most recent comparable reports accessible. This is an organisational guideline, not a medical record retention rule. Ask which documents are relevant to your care.
Store older documents in a labelled archive and record where it is kept. Our guide to organising medical test results and reports explains this system in more detail.
Medical symptom diary FAQs
How often should I update a symptom diary?
Make an entry when a relevant symptom or change occurs, preferably while the details are fresh. You do not need to record every minor detail. Ask your healthcare professional how often to record information and how long to continue if they have requested monitoring.
Should I record temperature, blood pressure or other readings?
Only record measurements that are relevant and that you know how to take correctly. Follow your healthcare professional’s guidance about what to measure and when. A diary records the result but does not tell you what that result means.
What if I cannot remember the exact time or duration?
Write an honest estimate, such as “around lunchtime” or “approximately 15 minutes”. Mark it as approximate rather than leaving out the entry or creating false precision.
Can a carer keep the diary?
Yes. Separate what the person reports from what the carer observes, and respect their privacy, preferences and consent.
Can an Observation Chart help in an emergency?
A completed chart may provide paramedics or other healthcare professionals with a concise record of what was observed and when. However, recording information must never delay calling Triple Zero (000), following emergency instructions or giving first aid. If it is safe, bring the person’s current medicines or medication list as well.
Should I wait and collect more entries before seeking help?
No. A medical symptom diary should not delay medical advice. If symptoms are new, worsening, persistent or worrying, contact an appropriate healthcare professional. For health information and guidance on where to seek care, contact healthdirect on 1800 022 222.
For a medical emergency in Australia, call Triple Zero (000). Healthdirect includes chest pain among the reasons to call an ambulance.
Keep useful observations together
A medical symptom diary does not need to be perfect. Its purpose is to capture relevant information without relying entirely on memory.
My Medical Folder helps individuals, families and carers keep symptom notes, current medication information, reports and appointment records together in one organised place.
Having cared for my sister and mother, I created it to reduce some of the searching and paperwork that can add to an already difficult time. Less searching. Less stress. Less overwhelm. More confidence.
Stay organised. Be prepared. Feel in control.