Free 1-Page PDF
Headaches You Should Never Ignore
Most headaches are harmless. But a few signals mean “see a doctor now.” Get the 1-page red-flag checklist, written by a specialist who has treated 100,000+ patients across 25 years.
What’s inside
1The 7 emergency red flags that need urgent care (thunderclap, new-after-50, fever + stiff neck, and more)
2The “not urgent, but see a doctor” signs — including the painkiller-frequency trap (medication-overuse headache)
3A printable checklist to keep and share with family
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25 yrs
Headache Practice
100K+
Patients Treated
#1 Korea
Triptan / CGRP Rx
Prefer to grab it now? Open & print the checklist →
⚠ Medical disclaimer: This material is general health information and does not replace diagnosis, treatment, or emergency care. If an emergency is suspected, call your local emergency number (e.g. 911 / 112). © 2026 HeadacheFree · Dr. Tae Ho Guak, Neurologist.