Bitter mouth during infusion needs to be discussed from Chinese medicine and western medicine respectively: 1. If from the perspective of Chinese medicine, bitter mouth is caused by fire, usually due to stomach fire, liver fire causing the clinical symptoms and manifestations of bitter mouth.2. If from the perspective of western medicine, bitter mouth during infusion is usually due to acute gastroenteritis, acute gastric mucosal atrophy or erosion, acute bile reflux gastritis, and if it is the function insufficiency of liver and gallbladder, such as acute heavy hepatitis, acute jaundice hepatitis, acute infectious hepatitis will also appear clinical symptoms. 3. Gallbladder insufficiency such as acute severe hepatitis, acute jaundice hepatitis, acute infectious hepatitis will also appear in the infusion of the clinical symptoms of bitter mouth. 3, gallbladder diseases such as acute suppurative cholangitis, bile reflux, obstructive cholangitis will also appear in the infusion of the clinical symptoms of the bitter mouth and performance. 4, the immune system of patients with low immunity, such as infusion of infusion of adverse infusion reaction will also appear in the infusion of the clinical symptoms and performance of the bitter mouth. The symptoms of bitter mouth can also be seen in patients with very low immunity when they have adverse infusion reactions.