Their pain receptors, called nociceptors, trigger in response, cueing the brain to release a flood  of neuropeptides that inflame the cranial blood vessels, swelling and heating up the head.
Njihovi receptori za bol, nociceptori, aktiviraju se, dajući mozgu znak da ispusti velike količine neuropeptida koji rade upalu krvnih žila u mozgu, uzrokujući oticanje i zagrijavanje glave.