Mood journaling is a dated record of how you felt, how strongly, and what was going on around you, kept briefly and read back after a couple of weeks. An entry is a number, a few words of context, and optionally a body sensation, a thought, and a sleep figure, and it takes two minutes. The value is in the read-back, when you can see that every bad day followed a short night, or that one weekday keeps coming out worse than the rest.
Quick Answer: A mood journal entry is a mood rating (1 to 10), one line of context (who, where, doing what), and optionally a body sensation, the thought that came with the feeling, and last night's sleep. Write it once a day at the same time. After fourteen days, read the entries back against five questions to find what recurs, which weekday, which person or place, and what preceded your best and worst days.
Definition: Mood journaling is the practice of recording your emotional state, its intensity, and the surrounding circumstances at regular intervals so that triggers and patterns become visible over time. In The Art of Journaling, chapter 10, I recommend a 1 to 10 mood scale recorded at consistent times, with notes on events, interactions, and thoughts, for exactly that purpose.
Key Evidence: A 2018 randomised trial by Smyth and colleagues in JMIR Mental Health found that general medical patients with elevated anxiety who kept an online positive-affect journal showed "decreased mental distress and increased well-being relative to baseline" and less depression and anxiety after one month than usual care.
Key Takeaways
- Rate mood 1 to 10 at the same time every day, add one line of context, and record last night's sleep in hours; two minutes.
- Pick the format by the problem: thought-feeling-behaviour for anxious predictions, what-happened when you have two minutes, window of tolerance with a trauma history or a therapist.
- Read the log back after 14 days against the five review questions, then write one if-then plan and test it for the next 14 days.
- Take two weeks of the unedited log to a doctor if the log shows sustained highs as well as lows, lows that track your cycle, or weeks of flat numbers with no situational cause.
- Stop and ground yourself if your heart races, you go numb, or you feel flooded while writing; switch to positive-only tracking for a while.
What goes in an entry
Five elements, two of them required, in the same order every day.
| Element | Example line | Required? |
|---|---|---|
| Mood, 1 to 10 | 4 | Required |
| Context: who, where, doing what | Alone, kitchen, after the team call | Required |
| Body | Tight jaw, tired legs | Optional |
| Thought | "I am behind and everyone can tell" | Optional |
| Sleep last night, hours | 5.5 | Optional but the most useful extra |
Specificity is what makes the record usable later. "I had anxiety this week" tells you nothing on read-back; "Anxiety 7, Tuesday, after the team meeting, chest tight" tells you where to look. Sleep is the extra most worth keeping because it most often explains a low number.
Three formats, one worked entry each
The five elements fit into three shapes. All three examples are illustrative.
Thought, feeling, behaviour
Borrowed from cognitive behavioural therapy. Three lines: the thought that arrived just before the feeling, the feeling and its intensity, and what you did in response.
Thought: "If I send this draft now, she will think it is careless." Feeling: anxious, 7. Chest tight. Behaviour: reread it four times, sent it 90 minutes late.
What happened, what it brought up, what I am learning
One line each. This is the two-minute format.
Happened: my brother cancelled Sunday lunch again. Brought up: flat, 3, and a "why do I bother" thought. Learning: the drop is about being the one who always arranges it.
Window of tolerance
For people with a trauma history or a therapist who uses the term. Four lines: inside your workable range, above it (agitation, panic), or below it (numb, shut down), and what happened just before any shift.
Before: inside, 6, reading on the sofa. Shift: above. Heart racing, wanted to leave the room. Preceded by: a raised voice from the flat upstairs. After 20 min: back inside, 5, after the breathing exercise.
Choosing a format: thought-feeling-behaviour when the problem is anxious predictions that keep turning out wrong; what-happened when you have two minutes; window of tolerance when you have a trauma history or a therapist who can help you read it.
A fourteen-day sample log
Two weeks of the minimum entry; the figures are illustrative.
| Day | Mood | Context | Body | Sleep (h) |
|---|---|---|---|---|
| Mon 1 | 5 | office | tired | 6.5 |
| Tue 2 | 3 | team meeting | tight chest | 5.5 |
| Wed 3 | 6 | home | fine | 7.5 |
| Thu 4 | 6 | gym | loose | 7 |
| Fri 5 | 7 | friends | warm | 7 |
| Sat 6 | 6 | errands | fine | 8 |
| Sun 7 | 4 | alone, evening | heavy | 6 |
| Mon 8 | 3 | office, deadline | headache | 5 |
| Tue 9 | 3 | team meeting | tight chest | 5.5 |
| Wed 10 | 5 | home | fine | 7 |
| Thu 11 | 7 | gym, then dinner out | loose | 7.5 |
| Fri 12 | 6 | office | fine | 7 |
| Sat 13 | 7 | walk with sister | warm | 8 |
| Sun 14 | 4 | alone, evening | heavy | 6 |
Read-back: every day rated 3 follows a night under six hours, and both Tuesdays share the same context and the same body word. Sunday evenings alone come out at 4 twice. That is three patterns from fourteen numbers, and none of them was obvious on any single day.
How to read it back
Do this once a fortnight, in ten minutes. In The Art of Journaling, chapter 5, I set out the method for any journal: review on a regular cycle, mark the recurring themes, reflect on what they mean, and track them against a goal over time. For a mood log the five questions are:
- What recurs? Which number, body word, or thought appears three or more times?
- Which weekday comes out worst, and which best?
- Which person or place appears in the low entries, and which in the high ones?
- What happened in the twenty-four hours before the best day?
- What happened in the twenty-four hours before the worst day?
Then write one if-then plan from the clearest pattern: "If I have slept under six hours, then I move the meeting prep to the afternoon and say so in the morning." Test it for the next fourteen days and see whether the Tuesday number moves. One plan at a time.
Read without judgement. If "I should have" or "why do I always" appear in the review, you are grading yourself. Rewrite the sentence as "I noticed that" and carry on. A person who appears in one low entry is a coincidence; in three, a pattern worth being curious about, which is still some way from a decision.
When a mood swing signals something more
Most swings have ordinary causes, and the log usually finds them. A few patterns warrant a conversation with a doctor:
- Extreme highs as well as lows. The National Institute of Mental Health describes bipolar disorder as mood episodes lasting "a week or two, or sometimes longer," with manic episodes in which a person may feel "excessively happy, irritable, or up" with a marked change in energy. Sustained 9s and 10s with little sleep, as well as the 3s, are the thing to show someone.
- Lows that track the menstrual cycle. The NHS lists mood swings among the symptoms of premenstrual syndrome, notes a more severe form, premenstrual dysphoric disorder (PMDD), and advises keeping "a diary of your symptoms for at least 2 menstrual cycles" for a GP appointment. A mood log with a cycle column is that record.
- Persistent low mood, or persistent agitation. The NHS lists "low mood or depression" among the symptoms of an underactive thyroid, and "nervousness, anxiety and irritability" and "mood swings" among those of an overactive one. Weeks of flat numbers with no situational cause are worth a blood test.
- Every low day follows a short night. The National Heart, Lung, and Blood Institute notes that sleep deficiency makes it harder to control emotions and behaviour. If your log looks like the sample above, sleep is the first thing to raise.
Bring two weeks of the unedited log to the appointment.
When journaling adds distress
If mood journaling consistently increases distress, something needs to change, and that is information. Reduce the intensity: switch to a simpler format, track only neutral or positive experiences for a while, or take a break when support is thin. Some experiences are too overwhelming to process alone through writing, and recognising that boundary is part of the practice.
Writing about an overwhelming experience without a way to steady yourself afterwards can pull you back into it. In 100 Mental Health Journaling Prompts I set out the safety side: keep sessions short, work in pieces you can manage, and pair difficult material with a grounding exercise. Three signals mean stop and ground yourself before continuing:
- Your heart is racing.
- You feel numb.
- You are becoming flooded.
Watch for avoidance too. If you are dodging the journal because entries feel like evidence of failure, add positive tracking: moments of joy, times you coped well. The Smyth trial above is the evidence that noting positive affect on its own reduces distress.
For a step-by-step setup of your first entries, use the four-part starter format. If you have tracked for a month and see nothing, read why mood journaling is not working before you stop.
Why mood journaling matters
A feeling noted in the moment is data. The same feeling remembered a week later is a story, and stories tend to blame whatever is nearest. The fourteen-day sample above contains three patterns, and none of them was visible on any single day. Fourteen numbers found them.
The record also changes what you can say to someone who can help. "I have been low" gives a doctor nothing to work with; two weeks of dated numbers with sleep and context gives them a starting point, and the NHS advice on premenstrual symptoms asks for exactly that.
Related reading
- How to Start Mood Journaling: A Simple Four-Part Format That Sticks
- Why isn't my mood journaling working?
- Top Digital Journaling Apps for Mental Health
- Mood and Wellness Bullet Journal Page Ideas
Sources
- Smyth et al. (2018), JMIR Mental Health: Online positive affect journaling in general medical patients with elevated anxiety – the randomised trial quoted in the quick answer and the distress section
- National Institute of Mental Health: Bipolar Disorder – the description of mood episodes and manic symptoms
- NHS: Premenstrual syndrome (PMS) – mood swings as a PMS symptom, PMDD, and the advice to keep a symptom diary for two cycles
- NHS: Underactive thyroid, symptoms – low mood or depression as a symptom
- NHS: Overactive thyroid, symptoms – anxiety, irritability, and mood swings as symptoms
- National Heart, Lung, and Blood Institute: Sleep deprivation and deficiency, health effects – sleep deficiency and control of emotions and behaviour
