Conditions in which the primary symptom is HEADACHE and the headache cannot be attributed to any known causes.

A primary headache disorder which occurs exclusively during sleep and regularly awakes patients at a consistent time of night.

Synonyms: Primary Cough Headache, Cough Headaches, Benign, Benign Exertional Headaches, Headache Disorders, Primary, Headache, Benign Cough, Headache, Cough, Exertional Headache, Benign, Headaches, Benign Exertional, Headache, Benign Exertional, Primary Thunderclap Headache, Stabbing Headache, Headache, Primary Thunderclap, Hypnic Headache Syndrome, Headache, Primary Cough, Cough Headache, Headaches, Ice-Pick, Benign Cough Headache, Ice Pick Headache, Hypnic Headache Syndromes, Headache, Ice-Pick, Headache, Primary Exertional, Exertional Headaches, Benign, Clock Headaches, Alarm, Alarm Clock Headache, Cough Headache, Benign, Primary Exertional Headache, Clock Headache, Alarm, Thunderclap Headache, Headaches, Benign Cough, Hypnic Headache, Headache, Hypnic, Primary Headache Disorder, Primary Stabbing Headache, Headache, Stabbing, Headache, Primary Stabbing, Disorders, Primary Headache, Headaches, Alarm Clock, Disorder, Primary Headache, Headache, Thunderclap, Ice-Pick Headaches, Headache, Alarm Clock, Alarm Clock Headaches, Headache Disorder, Primary, Headache Syndrome, Hypnic, Benign Cough Headaches, Primary Headache Disorders, Headache Syndromes, Hypnic, Benign Exertional Headache, Ice-Pick Headache