Diarrhea caused by heatstroke should be corrected first (e.g. moving to a ventilated and cool place, replenishing water and electrolytes, taking patchouli soft capsules, etc.). If diarrhea is not relieved after correcting the heatstroke, medicines such as berberine hydrochloride and bacillus licheniformis can be taken according to the doctor’s instructions. Heatstroke can lead to gastrointestinal dysfunction, which can lead to diarrhea. Diarrhea caused by heatstroke first need to correct the heatstroke, need to immediately transfer the patient to a ventilated, cool place, replenish enough water and electrolytes, oral saline and so on, can also follow the doctor’s instructions to take patchouli Zhengqi soft capsules and other medicines to relieve heatstroke. If the diarrhea is not relieved after correcting heatstroke, you can take berberine hydrochloride, montelukast and other medicines as prescribed by the doctor for anti-diarrhea treatment, and you can also take Bacillus licheniformis and other medicines to regulate the intestinal flora. Diarrhea caused by heatstroke is recommended to consult a doctor for early treatment to avoid delaying the condition. The use of drugs must follow the doctor’s instructions, not blindly use their own medicine, so as not to cause adverse consequences.