Yang deficiency and Yin deficiency are different in terms of causes and symptoms. 1. Yang deficiency is usually caused by a long period of illness, which depletes yang qi; or living in a cold place for a long period of time or taking cold and bitter drugs for a long period of time, which depletes yang qi; or a further development of qi deficiency; or a gradual decline in vitality at an older age. The manifestations of yang deficiency include cold limbs, fear of cold, 晄white color, like to drink hot water, urinate less and swollen, or urinate long, or spontaneous sweating (involuntary sweating during the day, aggravated by a little movement sweating), thin stools, white slippery moss, pale and fat tongue, and sluggish and feeble pulse, etc.. It can be accompanied by weakness, fatigue (lack of spirit), shortness of breath and other manifestations. 2. Yin deficiency is mostly due to miscellaneous diseases for a long time, or the late fever, depletion of yin; sexual intercourse without moderation, depletion of yin essence; excessive emotional and emotional, fire injury to the yin; over-served warm and dry medicines, the dark consumption of yin; old age and debilitation, yin deficiency formed. The performance of yin deficiency is thin, dry mouth and throat, two cheekbones flushing, hot flashes and night sweats (sweating abnormally after going to sleep, waking up after sweating stops), five heart heat (two hearts and two feet heart heat, and conscious of the heart and chest heat), urine amount of small yellow, dry stools, red tongue with little moss, less fluid, pulse (pulse becomes narrower and finer and the rate of speeding up), and so on. If there is any discomfort, it is recommended to consult the hospital in time, under the guidance of a professional physician, do not take medication without authorization, so as not to delay the condition.