Health & Activity · Humanity estimated
How many people are experiencing a headache right now?
Broad self-reported symptom assumption.
people, approximately
≈ Modelled estimate · updated continuously
How this experiencing a headache estimate works
Σ (region population × participation × local-hour probability)
The model applies 16% broad participation to the eligible population, uses a typical 190-minute activity window, and distributes the result around local daytime and evening hours across population-weighted time zones.
What the number means
Broad self-reported symptom assumption. Health, age, access and reporting differences make the real total uncertain. The number is a broad modelled estimate, not direct tracking of individuals.
This estimate is for curiosity and perspective. Activities can overlap, and the totals should not be added together as if every category were exclusive.
Baseline sources
These sources anchor the normal model. Activity-specific participation and duration remain clearly labelled modelling assumptions.
Status: Activity-specific source review in progress. Last reviewed: August 2026.