Cluster headaches were found to be more likely to occur in spring and fall, with attacks generally happening between late night and early morning.
Notes on verification
Confirmed by multiple independent clinical and peer-reviewed sources (Cleveland Clinic, NCBI/StatPearls, AAN meta-analysis, URMC), consistent on both seasonal pattern (spring/fall) and circadian timing (late night/early morning) of attacks. [tier=gold indep_score=0.9 clusters=4 claim_tier=notable]
Sources
- Migraine and Cluster Headaches are Linked to the Body's Internal ... (seed:health_and_medicine)
- https://www.aan.com/PressRoom/Home/PressRelease/5067 (corroboration)
- https://my.clevelandclinic.org/health/diseases/5003-cluster-headaches (corroboration)
- https://www.ncbi.nlm.nih.gov/books/NBK544241/ (corroboration)
- https://www.urmc.rochester.edu/encyclopedia/content?contenttypeid=56&contentid=723 (corroboration)