Most mood apps ask how you feel and when. Almost none ask whether the room was loud, the lights were fluorescent, or the supermarket was full at 6pm. For a lot of people who are autistic, ADHD, sensory-sensitive, or chronically migraine-prone, that missing axis is often the loudest one. Sound, light, smell, crowd density, and texture all change affect, sometimes within minutes, and a mood log that ignores them produces a chart with the cause column blank.
Sensory load is mood input
Sensory input is not a backdrop to emotional life; it's part of the same regulation budget. A fluorescent-lit open-plan office at 3pm, a packed bus, a kitchen full of competing smells: these aren't neutral environments waiting for something else to make you tired. They are the something else. Treating sensory context as a tag on a check-in, the same way you'd tag meeting or argument, is what makes the pattern visible later.
What sensory modulation difficulty looks like
Researchers usually split atypical sensory processing into three patterns. Hyper-responsivity is over-reaction to mild stimuli: a normal-volume conversation feels loud, a tag in a shirt is intolerable, the supermarket lights cause a headache within ten minutes. Hypo-responsivity is the opposite, with slow registration of sensation and sometimes missed pain or temperature signals. Sensory-seeking is the active drive for stimulation: loud music, intense flavours, deep pressure. Schauder and Bennetto's 2016 review distinguishes these clinically and notes the same person often shows different patterns across different senses.4
The Ben-Sasson 2009 meta-analysis pooled 14 studies comparing autistic and non-autistic groups on sensory modulation.1 Atypical patterns were significantly more common in the autistic samples across all three categories, with the largest effects in early childhood and a different distribution by age and subtype than in the non-autistic comparison. The meta is the standard anchor for the claim that sensory modulation differences are a stable feature of autism, not a side effect of anxiety or behaviour.
It's not only an autism issue
Sensory sensitivity is not binary. Robertson and Simmons sampled 212 non-autistic adults in 2013 and found sensory sensitivity scores correlated with autistic-trait scores across the whole sample.2 Their conclusion was that sensory sensitivity sits on a continuum: clinically significant differences appear in roughly 5–16% of adults depending on the threshold used, and many of those people don't identify as autistic. ADHD, generalised anxiety, migraine, PTSD, and chronic stress all interact with sensory processing too.
The practical implication for journalling is the same regardless of label. If loud spaces, certain lighting, or particular textures reliably produce a mood drop in you, sensory load is a variable worth tracking, diagnosis or no diagnosis.
How sensory load lands in mood
Engel-Yeger and colleagues studied 92 patients with mood disorders in 2016 and found that extreme sensory processing patterns, both hyper- and hypo-responsivity, correlated with mood disorder severity in bipolar and major depression.3 The direction of causality is not clean from a cross-sectional design; sensory load may worsen mood, low mood may amplify sensory sensitivity, and shared neurobiology may drive both. The association itself is consistent across studies.
The plain mechanism most researchers describe is regulatory. Sustained sensory filtering is metabolically expensive. The brain spends regulation budget on suppressing irrelevant input: fan noise, fluorescent flicker, the texture of a chair. What's left for emotion regulation, social processing, working memory, and decision-making is less. Affect drops, irritability rises, the threshold for the next mild stressor falls. By 4pm in a hard sensory environment, the same disagreement that was nothing at 10am is a fight.
Practical: track it
Don't try to log every sensation. The cost of an exhaustive sensory diary is exactly that no one keeps one for more than a week. Pick two or three sensory contexts that you already suspect matter. For many people the candidates are open-plan office noise, supermarket lighting, transit crowds, or specific weather conditions.
Tag the relevant Colors check-ins with these as triggers. The Health category already includes fatigue, headache, and sleep, which often rides on sensory load; Activities and Places hold Office, Driving, and similar items where sensory context is implicit. Anything more specific, like crowd, fluorescent lights, or strong smells, fits naturally as a custom factor or activity. The split between acute and chronic matters here too; if you're not sure where a variable belongs, the triggers vs factors article walks through the logic.
After a few weeks the weekly view shows whether the bad mood was the meeting, the supermarket, or the combination of both on the same Thursday. That's enough signal to plan around.
Recovery, not only avoidance
Avoidance reduces exposure; recovery rebuilds capacity after exposure. Both matter, and tracking helps you tell which one you're short on. Fifteen minutes of low-stimulation transition before a social event. An exit plan from a busy space before you arrive. Loop earplugs or noise-cancelling headphones in environments you can't leave. A car ride home in silence after a loud day. None of these are weaknesses. They are regulation tools, and the data from a mood log is what makes their value legible. Gym days after the office produce sharper mood drops than gym days from home is the kind of finding that justifies a buffer.
What Colors does and doesn't do
The trigger picker has predefined Health items (Menstruation, Headache, Fatigue, Sleep) that already cover a lot of the sensory-adjacent territory, plus Activities and Places. Sensory-specific items can be added through the customisable factor list. The point of tagging is not to label what's wrong with you; it's to make the input visible so the regulation work has data to stand on.
Tracking surfaces patterns. The regulation work itself, whether that is pacing, recovery routines, environmental change, or sometimes medication, is yours, and where it's heavy, it's worth doing with an occupational therapist or clinician familiar with sensory profiles rather than from a journal alone. A mood log is a useful instrument for the question what is happening, and a poor substitute for the answer to what to do about it.
Frequently asked questions
What is sensory overload?
Sensory overload is the state where incoming sensory information — sound, light, smell, touch, crowd density — exceeds what the nervous system can comfortably filter and integrate. It often shows up as irritability, exhaustion, sudden withdrawal, headache, or shutdown. It is most associated with autism and SPD (sensory processing differences) but is not exclusive to either. Robertson and Simmons' 2013 work showed sensory sensitivity sits on a continuum across the general population.
Is sensory overload only an autism thing?
No. The Ben-Sasson 2009 meta-analysis confirms atypical sensory modulation is reliably more common and more pronounced in autism, but Robertson and Simmons 2013 found that sensory sensitivity correlates with autistic traits in non-diagnosed adults too. Many ADHD, anxious, and chronically migraine-prone people also experience sensory overload regularly.
How is sensory load related to mood?
Engel-Yeger and colleagues' 2016 paper found that extreme sensory processing patterns are associated with mood disorder severity in bipolar and major depression. The mechanism most researchers describe is regulatory — sustained sensory filtering is metabolically costly, so emotion regulation, social processing, and decision-making run on a smaller budget when sensory load is high.
How do I track sensory overload in Colors?
Pick two or three sensory contexts that matter for you — for example open-plan office noise, supermarket lighting, transit crowds. Tag those check-ins with the relevant Health, Place, or Activity triggers, or add custom items to your factor list. After a few weeks the chart will show whether the mood drop tracks the meeting, the supermarket, the commute, or some combination.
What's the difference between avoiding overload and recovering from it?
Avoidance reduces exposure; recovery rebuilds capacity after exposure. Both matter. Building a fifteen-minute low-stimulation buffer before a social event, an exit plan from busy spaces, or routine headphones use are regulation tools, not weaknesses. Tracking helps you see which contexts deplete you the most so the recovery plan is realistic rather than aspirational.
Not medical advice
This article is for informational and educational purposes only. It does not constitute medical advice and should not replace consultation with a licensed mental health professional. If you are in crisis, please contact emergency services in your country immediately.
Crisis lines: US — 988 Suicide & Crisis Lifeline · UK / Ireland — Samaritans 116 123 · EU — Befrienders Worldwide
Last reviewed: May 2026.
References
- Ben-Sasson, A., Hen, L., Fluss, R., Cermak, S. A., Engel-Yeger, B., & Gal, E. (2009). A meta-analysis of sensory modulation symptoms in individuals with autism spectrum disorders. Journal of Autism and Developmental Disorders, 39(1), 1–11. doi:10.1007/s10803-008-0593-3
- Robertson, A. E., & Simmons, D. R. (2013). The relationship between sensory sensitivity and autistic traits in the general population. Journal of Autism and Developmental Disorders, 43(4), 775–784. doi:10.1007/s10803-012-1608-7
- Engel-Yeger, B., Muzio, C., Rinosi, G., Solano, P., Geoffroy, P. A., Pompili, M., Amore, M., & Serafini, G. (2016). Extreme sensory processing patterns and their relation to mood disorders. International Journal of Bipolar Disorders, 4, 7. doi:10.1186/s40345-016-0048-2
- Schauder, K. B., & Bennetto, L. (2016). Toward an interdisciplinary understanding of sensory dysfunction in autism spectrum disorder. Frontiers in Neuroscience, 10, 268. doi:10.3389/fnins.2016.00268