Fall diarrhea is caused by rotavirus infection. The symptoms of fall diarrhea in adults are similar to those of fall diarrhea in children, i.e., diarrhea, bloating, nausea, vomiting, fever, dizziness, fatigue, limb weakness, etc. It is recommended that when adults have fall diarrhea, they should be given probiotics to regulate intestinal flora, usually oral Clostridium typhimurium tablets or Bacillus coagulans, Bacillus subtilis capsules and so on. At the same time, we should pay attention to a light diet, eating less and more meals, preferably starting with a semi-liquid diet without oil, gradually transitioning to a semi-liquid diet with less oil, and returning to a normal diet according to the recovery of the disease. In case of more serious diarrhea, it is recommended to go to the hospital as soon as possible and cooperate with the doctor to give examination and treatment.