<unk>   is a neurological disease best known for severe headaches that are its most salient symptom.. Usually<unk>  causes episodes of severe or moderate headache (which is often one-sided and pulsating) lasting between several hours to three days, accompanied by gastrointestinal upsets, such as nausea and vomiting, and a heightened sensitivity to bright lights (photophobia) and noise (phonophobia). Approximately one third of people who experience<unk>  get a preceding aura.<unk> s' secondary characteristics are inconsistent. Triggers precipitating a particular episode of<unk>  vary widely. The efficacy of the simplest treatment, applying warmth or coolness to the affected area of the head, varies between persons, sometimes worsening the<unk> .  A particular<unk>  rescue drug may sometimes work and sometimes not work in the same patient. Some<unk>  types don't have pain or may manifest symptoms in parts of the body other than the head. Available evidence suggests that<unk>  pain is one symptom of several to many disorders of the serotonergic control system, a dual hormone-neurotransmitter with numerous types of receptors. Two disorders — classic<unk>  with aura (MA, STG) and common<unk>  without aura (MO, STG) — have been shown to have a genetic factor.  Studies on twins show that genes have a 60 to 65% influence on the development of<unk> . Additional<unk>  types are suspected and could be proven to be genetic.<unk>  understood as several or many disorders could explain the inconsistencies, especially if a single patient has more than one genetic type. However, still other<unk>  types might be functionally acquired due to hormone organ disease or injury. Three quarters of adult<unk>  patients are female, although pre-pubertal<unk>  affects approximately equal numbers of boys and girls. This reveals the strong correlation to hormonal cycling and hormonal-related causes or triggers. Hormonal<unk>  is a likely consequence of periodically falling hormone levels causing reduction in protein biosynthesis of metabolic components including intestinal tract serotonin.
Migraine
Tension headache
Cluster headache
Subarachnoid hemorrhage
Thunderclap headache
Benign paroxysmal positional vertigo
Red wine headache
Benign positional vertigo 