Headache Disorders, Primary |
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| Alarm Clock Headache; Benign Cough Headache; Benign Exertional Headache; Cough Headache; Headache, Thunderclap; Hypnic Headache; Hypnic Headache Syndrome; Ice-Pick Headache; Primary Cough Headache; Primary Exertional Headache; Primary Headache Disorders | |
| Conditions in which the primary symptom is HEADACHE and the headache cannot be attributed to any known causes. | |