Children’s diarrhea, may be caused by infection caused by enteritis, food poisoning or lactose intolerance, treatment methods include medication, etc., the doctor will be based on the actual condition of the child to choose the specific treatment, there is no so-called “fastest and most effective”. 1. Enteritis caused by infection: The clinical manifestations of enteritis are mainly characterized by digestive symptoms, such as fever, nausea, vomiting, abdominal pain, diarrhea and so on. Infectious enteritis is mostly caused by bacterial infections, and can be treated with, for example, amoxicillin clavulanate potassium and cefixime. 2. Food poisoning: Food poisoning is mainly characterized by nausea, vomiting, diarrhea and other symptoms. Food poisoning is caused by eating poisonous food or food contaminated with bacteria, bacterial metabolites or other toxins. Doctors will implement individualized treatment plans based on the type of food poisoning and the specific condition of the patient. 3. Lactose intolerance: Patients with lactose intolerance may experience abdominal distension, hyperactive bowel sounds, abdominal pain, diarrhea, nausea and vomiting after eating. The most fundamental reason for lactose intolerance is the lack of lactase or low lactase activity, which can be treated with compound Lactobacillus acidophilus and lactase. Parents of children with diarrhea should follow the doctor’s instructions and actively cooperate with the doctor for the treatment of children, do not blindly treat yourself, so as not to delay the condition or adverse reactions. The above drugs should be used in accordance with medical advice.