人在生气时,会使大脑神经高度兴奋,引起皮肤的神经末梢紧张、毛细血管收缩、血流缓慢与阻滞,造成氧气对皮肤的供应减少,皮肤便会出现程度不同的紫色。经常发脾气,面色就容易变深,甚至发黑。同时由于生气所致毛细血管收缩或痉挛,可造成皮肤毛细血管循环障碍,输送至皮肤的各种营养物质减少。这样,皮肤由于各种营养物质减少, People are angry, the brain will be highly excited, causing nerve endings nervous, capillary contraction, slow blood flow and block, resulting in reduced oxygen supply to the skin, the skin will appear a different degree of purple. Often angry, complexion easily become darker, or even black. At the same time as a result of angry capillary contraction or spasm, can cause skin capillary circulation disorders, reduce the delivery of various nutrients to the skin. In this way, the skin due to a variety of nutrients to reduce,