;
潮;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.
活动中，头部和颈部
常会收缩，而
潮时血压会增。这些情况会导致大脑中血管扩张，学术上这种情况被称为“<span class="key">交头痛”。
