Crash migraine
Severe headache of sudden onset is a concern despite its occurrence in primary headache disorders. Migraine headaches may have an abrupt onset; these are termed "crash" migraine headaches and are similar to a "thunderclap" headache. Cluster headache also may be sudden and excruciating, but it lasts only 15-180 minutes and is recognized easily if the patient has had previous attacks.
Exertional headache
Exertional headaches are precipitated by strenuous activity (eg, running, coughing, sneezing, Valsalva maneuver) and build in intensity over minutes. They are particularly common in patients who have an inherited susceptibility to migraine. Coital headache is a type of exertional headache that can develop at the height of orgasm or it may build up through intercourse.