Diarrhea is clinically known as diarrhea, and after diarrhea, patients tend to lose water and electrolytes, resulting in water-electrolyte disorders and acid-base imbalance, which may lead to low potassium, low chloride and low sodium in the body, as well as generalized fever and even weakness. The common cause of this condition is infection, usually related to cold and improper diet. If the patient ingests spoiled or rotten food, it may lead to bacterial infection of the gastrointestinal tract, which may cause intestinal dysfunction, resulting in edema and exudation of the intestinal mucosa, leading to diarrhea, weakness, and possibly nausea and vomiting. In addition, if the human body is attacked by pathogens such as artificial viruses, norovirus, cupavirus, etc., it may also cause acute inflammation of the gastrointestinal mucosa, resulting in infectious diarrhea, accompanied by weakness and other symptoms, and in severe cases, it may also lead to dehydration, acidosis, or even shock. In addition, it is recommended that patients should go to the hospital promptly and undergo active treatment. In addition to fluid infusion, correction of water-electrolyte and acid-base imbalance, targeted antibiotics such as cefadroxil, azithromycin and ciprofloxacin, or antiviral drugs such as ribavirin and ganciclovir should be used for treatment.