If you are asked to keep track of your mood, the instruction is usually a rating out of ten, daily. That produces a long series of numbers that mean very little, because a 6 on Tuesday and a 6 on Friday can be entirely different states, and because rating your mood daily makes you think about your mood daily.
There is a better version, and it involves recording less.
What a number cannot carry
A mood rating collapses several independent things into one dimension:
- How low you felt
- How anxious you felt
- How irritable you were
- How much you were able to enjoy anything
- How much energy you had
- How steady you were — whether it moved
Two people, or the same person on two days, can rate identically with completely different combinations of these. And the combination is exactly what a clinician needs, because it distinguishes states that respond to different things.
What is actually worth recording
Shifts, not levels. A change is informative. A steady state, once established, is not worth re-recording every day.
Duration. Two hours, two days or two weeks are three different clinical observations. This is one of the most important things a record can capture and one of the least often noted.
Whether something triggered it, and whether the reaction was proportionate to what happened. "Furious for twenty minutes because of an email, then completely fine" is a specific and useful observation. So is "flat for four days with nothing I can point to."
Whether enjoyment was available. The most useful single question about mood, and it is binary enough to record quickly. Did anything feel good today, at all? A run of days where the answer is no is significant in a way that a low number is not.
What else was going on. Sleep, alcohol, medication changes or missed doses, illness, and — if relevant to you — cycle day. Four fields, and they are where most of the explanatory power sits.
Irritability, separately. Frequently the first thing to change and the last thing recorded, because it does not feel like a symptom. It feels like other people being annoying.
What is worth raising rather than tracking
Some things should be reported when they happen, not accumulated in a log:
- Thoughts of harming yourself or of not being here — local emergency number, or in the US call or text 988
- A shift that is sudden and marked, over hours or days
- Elevated mood, reduced need for sleep with no tiredness, racing thoughts, unusually fast speech, or uncharacteristic risk-taking. This pattern is specifically worth raising promptly, because it changes what treatment is appropriate and some treatments can make it worse
- Any new thought or perception that frightens you
- A change others have noticed and are commenting on
A log is for patterns over weeks. None of the above should wait for one.
A format that works
One line, on days when something shifted:
14th — flat from mid-morning, lasted the day. Nothing triggered it. Slept 5h. Nothing enjoyable. 17th — snapped at my daughter over nothing, felt awful after. Otherwise fine. Busy week. 21st — good day. Actually enjoyed the evening. Slept 8h.
Include the good days. A log of only bad days is misleading to a clinician and demoralising to keep.
Three or four entries a week is plenty. If you are writing something every day, either a great deal is shifting or you have started monitoring rather than recording.
Where this goes wrong
Mood tracking has a specific failure mode: the act of rating your mood requires attending to your mood, and attending to your mood is one of the more reliable ways to make it worse. There is a version of this that becomes several check-ins a day, a chart, and a worse month.
Signs to stop and switch to a weekly review:
- Rating yourself more than once a day
- Feeling worse after logging
- Rereading old entries to compare
- Feeling that a good day has to be justified
- Recording things you would not have noticed before you started
A ten-minute weekly review of what actually happened captures everything useful and does not involve living inside the question.
What to do with it
Summarise before an appointment. Not the raw log:
Over six weeks: four episodes of flat mood lasting a day or more, three with no trigger I could find. The two worst weeks were the ones I slept badly. Irritability has been the most consistent thing — most days. There were good days, roughly one in five, and I did enjoy things on those. No thoughts of self-harm.
That is a paragraph with duration, frequency, triggers, a confounder, preserved enjoyment, and a safety statement. It took five minutes and it is a much better starting point than a chart.
The limit worth holding onto
A record shows what happened and what happened alongside it. It cannot establish cause. That the flat days were the badly slept days is an association in your own data — a good reason to look at sleep, never proof that sleep was the reason.
Bringing the association rather than the conclusion is what makes the conversation productive. It invites investigation instead of disagreement.