Probiotics can be used to treat diarrhea and are often used as the first choice of medicine for diarrhea treatment. Because probiotics can play the role of regulating the disorder of intestinal flora, can inhibit the pathogenic bacteria in the intestine, inhibit the inflammatory response of the intestine, so it can play a role in relieving diarrhea. In addition, probiotics also have a certain role in improving the immunity of the body, and can also promote the digestion and absorption of nutrients. Probiotics have almost no toxic side effects, so they are suitable for a wide range of patients, including pregnant and maternal as well as pediatric patients. Consult a specialist for specific probiotic choices as well as drug usage and dosage. Patients with diarrhea symptoms or intestinal flora imbalance can be treated with probiotics first, and if necessary, they can visit a hospital.