Diagnostic keys of the headache

Headache is a very common symptom, affecting nearly everyone at some point in their lives. In fact it is the fifth most common reason for consultation in the emergency room and a significant number of patients demand assistance at the ambulatory care clinic for chronic headache. The pediatric and adolescent population is also affected. An adequate medical history and physical examination allow a full diagnosis and therapeutic approach. Identifying the triggering facts and personal history is essential. The presence of sick headache combined with other signs and symptoms such as altered state of consciousness, neurological focalization, and seizures, among others, should alert physicians. This article describes the demographic and semiological features of headaches; it also addresses the warning signs or red flags that force dismissal of more serious pathologies.