Here we delineate it as a primary headache
, postulating that the pain arises from the meninges; that the brain is also involved is indicated by impaired concentration and irritability, although not studied in detail in this preliminary survey," the study's (https://headachejournal.onlinelibrary.wiley.com/doi/full/10.1111/j.1526-4610.2004.04014.x) conclusion read.
TTH is a common primary headache
, which is episodic and occurs in more than 70 per cent of some populations.
The signs and symptoms of the primary headache
disorders such as tension-type headache, migraine, or hemicrania continua may mimic the clinical features of CH.
* Headaches in pregnancy are common, usually occur in the first trimester and are related to a primary headache
Study of various social and demographic variables associated with primary headache
disorder in 500 school going children in central India.
TMD may relate with the etiologic mechanism of headache for the following potential reasons: TMD may result in headache, a secondary disorder as classified in the ICHD-II (6) TMD may increase the severity of existing primary headache
 Headache after injury may be a new primary headache
or exacerbation of preexisting primary headache
A primary headache
is not a symptom of an underlying disease but is caused by over activity of pain-sensitive structures in the head.
disorders in the adult general population of Pakistan - a cross sectional nationwide prevalence survey.
(16) If a secondary headache can be excluded by history, physical and neurological examination, or appropriate testing, the next step is to identify the primary headache
It has been used in different types of primary headache
, although its mechanism of action in PSH is unknown (8).