春天,由于阳气升发,人体气血趋向体表,循环系统功能加强,皮肤末梢血液供应及汗腺分泌增多,各组织器官负荷加重,于是中枢神经系统产生了一种镇静、催眠作用,使身体困乏,早晨不易醒来,醒后又昏昏欲睡,这种现象俗称“春困”。 In spring, due to the ups and downs of the body, qi and blood lead to the body surface and circulatory system, the supply of peripheral blood and the secretion of sweat glands are increased, and the organs and organs in the tissues are aggravated. Thus, the central nervous system produces a sedative and hypnotic effect, Sleepy, not easy to wake up in the morning, wake up and sleepy, this phenomenon is commonly known as “spring sleepy.”