核;
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
，头部和颈部的肌肉通常会收缩，而
时血压会增。这些情况会导致大脑的血管扩张，在学术上这种情况被称为“交头痛”。
