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From Biology-Online Dictionary | Biology-Online Dictionary
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noun, plural: headaches

Pain in the head region, often caused by dilation of cerebral blood vessels, traction of the meninges, muscle contraction, and organic diseases


Headaches are commonly felt in the following conditions:

Headaches do not occur in brain tissues since they lack nociceptors or pain-receptors. Rather, they occur in structures situated intra- and extracranially, where nociceptors are present.

There are various types of headaches. Basically, they may be vascular (blood vessel-related), cervicogenic (muscle tension), or organic (disease-related).

Headaches may also be primary headache or secondary headache.


  • head ache


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