收缩血管的

Head and neck muscles often tighten during sexual activity, and blood pressure can increase at orgasm, causing blood vessels in the brain to dilate, a condition technically named coital cephalgia.

在活动中，头部和颈部的肌肉通常会收缩，而潮时血压会。些情况会导致大脑中的血管张，在学术上种情况被称为“头痛”。