Editing Thunderclap headache (section)

{{short description|Severe and sudden-onset headache}}
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| name            = Thunderclap headache
| synonyms        = Lone acute severe headache
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| field           = [[Neurology]]
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A '''thunderclap headache''' is a [[headache]] that is severe and has a  sudden onset. It is defined as a severe headache that takes seconds to minutes to reach maximum intensity.<ref name=Schwedt>{{cite journal |vauthors=Schwedt TJ, Matharu MS, Dodick DW |title=Thunderclap headache |journal=Lancet Neurol |volume=5 |issue=7 |pages=621–31 |date=July 2006 |pmid=16781992 |doi=10.1016/S1474-4422(06)70497-5|s2cid=5511658 }}</ref><ref name=ACEP2008>{{cite journal |vauthors=Edlow JA, Panagos PD, Godwin SA, Thomas TL, Decker WW |title=Clinical policy: critical issues in the evaluation and management of adult patients presenting to the emergency department with acute headache |journal=Ann Emerg Med |volume=52 |issue=4 |pages=407–36 |date=October 2008 |pmid=18809105 |doi=10.1016/j.annemergmed.2008.07.001 |s2cid=507361 | url=http://www.annemergmed.com/article/S0196-0644(08)01463-7/fulltext|url-access=subscription }}</ref> Although approximately 75% are attributed to "primary" headaches—headache disorder, non-specific headache, idiopathic thunderclap headache, or uncertain headache disorder—the remainder are secondary to other causes, which can include some extremely dangerous acute conditions, as well as infections and other conditions.<ref name=Devenney>{{cite journal|last1=Devenney|first1=Emma|last2=Neale|first2=Hazel|last3=Forbes|first3=Raeburn B|title=A systematic review of causes of sudden and severe headache (Thunderclap Headache): should lists be evidence based?|journal=[[The Journal of Headache and Pain]]|date=14 August 2014|volume=15|issue=1|page=49|doi=10.1186/1129-2377-15-49|pmid=25123846|pmc=4231167 |doi-access=free }}</ref> Usually, further investigations are performed to identify the underlying cause.<ref name=Schwedt/>