If you have a dry and bitter mouth in the middle of the night, whether you can drink dandelion water should depend on the situation. 1. Bitter mouth is a manifestation of heat syndrome, which can be caused by heat in the liver and gallbladder and fire. Dandelion water has the effect of clearing heat and removing toxins, so you can drink it in general. 2. The following three cases are not recommended to drink dandelion water: (1) Deficiency of fluid: Deficiency of fluid is generally known as Yin deficiency. If you have a deficiency of yin, you need to clear heat and nourish yin. Dandelion water is bitter and cold in nature, although it is strong in clearing away heat and detoxification, but the effect of nourishing the yin is not good, so it is not recommended to drink. (2) qi deficiency: the distribution of fluid is mainly by virtue of the lungs, spleen, kidney organs. In Chinese medicine, the lungs are the main source of water, the spleen is the main source of water, and the kidneys are the main source of water. Insufficient qi in the lungs, spleen and kidneys will cause dry mouth discomfort. Here one should tonify the lung, spleen and kidney qi, drinking dandelion water is not very symptomatic. (3) Certain pathological products: the channels for transporting fluids are obstructed. The main pathological products are Qi stagnation, phlegm-dampness and blood stasis. Qi stagnation is usually associated with emotional upset and depression. Phlegm-dampness, mainly related to spleen deficiency. Stasis of Blood leads to dry mouth not wanting to drink water. Dandelion water is bitter and cold, which is not conducive to unblocking qi, harmonizing the stomach and resolving dampness, activating blood circulation and removing blood stasis. Dandelion water is not recommended in this case. If you really need to use this formula, you need to use it after identification by a Chinese medicine practitioner, avoid self-medication to avoid adverse consequences.