Patients with complaints of acute headache comprise 4% of emergency department visits.1 Most headaches presenting to the ED are primary headaches such as migraines, however, important secondary causes, such as hemorrhage, cannot be missed.2. A recent CrackCast outlined an excellent approach to headache red flags. The HEADACHe mnemonic can help you remember these red flags3! History describing the worst headache of life or a headache that is different than usual Exertion as a trigger for …