Traditional Chinese medicine believes that night sweats are mainly caused by yin deficiency. Yin deficiency refers to the insufficient yin fluid in the body, which leads to insufficient nourishment of various organs, resulting in a series of symptoms in the body. Night sweating is one of the common symptoms, usually manifested as sweating during sleep at night and stopping after waking up.
In traditional Chinese medicine theory, sweat is formed by the transpiration of yin fluid from the body's yang qi. If there is insufficient yin fluid in the body, the yang qi will lose its constraint, leading to the endogenous generation of deficiency heat. This type of deficiency heat can cause a series of discomfort symptoms in the body, such as night sweats, dry mouth and tongue, insomnia, and excessive dreaming. At the same time, Yin deficiency may also cause other symptoms, such as dizziness, tinnitus, and soreness in the waist and knees.
中医认为，盗汗主要是由于阴虚所致。阴虚是指体内阴液不足，导致身体各器官无法得到充分的滋养，从而使身体出现一系列症状。盗汗是其中一种常见的症状，通常表现为夜间睡眠时出汗，醒来后汗止。

在中医理论中，汗液是由体内的阳气蒸腾阴液而形成的，如果体内阴液不足，阳气就会失去制约，从而导致虚热内生。这种虚热会使身体出现一系列不适症状，如盗汗、口干舌燥、失眠多梦等。同时，阴虚还可能引起其他症状，如头晕、耳鸣、腰膝酸软等。