Diarrhea can be cupped, but different methods should be used for different types of evidence. For diarrhea, you will usually cupping Shen Que point, Tian Shu, Guan Yuan, Zhong Gu, Yu of the Large Intestine, Yu of the Kidney, and Zhen Men. It is better to use fire cans rather than the spare gas cans at home, because the fire cans have a warming effect, and the mouth of the cans should be overheated to reach a certain temperature while cupping, if the patient has diarrhea, the cool cans will aggravate the condition after cupping, while the mouth of the cans will be heated and then the patient will feel comfortable. The cupping time should not be too long, usually 5-10 minutes. If the patient has diarrhea, the symptoms of diarrhea are heavy and the patient is thin, cupping should not be used, but moxibustion and umbilical cord moxibustion. If the patient has damp-heat diarrhea or injury diarrhea, then cupping can be used. Therefore, the choice of fire cupping for diarrhea should be based on different types of evidence and different methods.