| Description: | Develop tiredness, yawning, concentration problems, changes in mood or appetite, irritability, neck stiffness, light or sound sensitivity before or near the onset of headaches | 
| Category: | Online follow-up ⏵ Experience of pain | 
| Participants | 59,783 | Value Type | Categorical (single) | Sexed | Both sexes | Debut | Dec 2020 | |||
| Item count | 59,783 | Item Type | Data | Instances | Singular | Version | Jul 2025 | |||
| Stability | Accruing | Strata | Primary | Array | No | Cost Tier | o1 s1 | 


