The possible clinical reasons for not being able to sleep at night after taking Chinese medicines include the presence of central excitatory substances in Chinese medicines, stimulation of the gastrointestinal tract by Chinese medicines, and adverse reactions to the medicines. 1. Chinese medicines contain central excitatory substances: clinically, these common Chinese medicines include peppermint, ice chips, ginseng, green peels, etc. All of the above Chinese medicines contain central nervous system excitatory substances, which may cause the people who take them to have difficulty in falling asleep. 2. Chinese medicines stimulate the gastrointestinal tract: clinically common Chinese medicines of this kind are rhubarb, Huanglian, mannite, keel bone and so on. This kind of Chinese herbal medicine will have a certain degree of irritation to the gastrointestinal tract, which may cause gastrointestinal discomfort, such as diarrhea, vomiting, abdominal pain, etc., and it is difficult to sleep due to physical discomfort. 3. Adverse reactions to medication: some people can not tolerate the Chinese medicine they are taking, and experience serious discomfort after taking the medicine, which is an adverse reaction to medication, and it is recommended to stop taking the medicine in time as well as consult a doctor as soon as possible in order to clarify the cause of the adverse reaction to medication. If the symptoms continue to exist despite the use of the medicine, it is recommended to suspend the use of the medicine and consult the relevant doctor before making the next treatment plan.