Old farting after taking tonic may be caused by inhaling a large amount of air when taking medicine, weak spleen and stomach, and regulating qi. Inhaling a lot of air when taking medicine: when taking medicine, if the patient chats or eats medicine too fast, it will cause a lot of air to enter into the digestive system along with the medicine, then it will lead to too much air in the intestines, and farting will occur all the time. Weakness of the spleen and stomach: when the patient’s spleen and stomach are weak, there will be a situation where the deficiency is not compensated for, and when the patient takes tonic medicine, it will lead to accelerated intestinal peristalsis and an increase in the gas in the intestines, which will lead to the symptom of old farting. The gas can be regulated and moved: some tonics contain ingredients that can regulate and move gas, when the patient has certain gastrointestinal discomfort, taking this kind of tonic will lead to the gas in the gastrointestinal system does not go down, so there will be the phenomenon of old fart. Taking supplements need to follow the doctor’s advice, farting situation is serious, it is recommended to go to the hospital for follow-up.