Probiotics are normal flora that reside in the gastrointestinal tract. All people have probiotics growing in their bodies. Probiotics have the ability to regulate the intestinal flora, relieve gastroenteritis, indigestion, constipation, diarrhea and other digestive disorders, and help in the digestion and absorption of food. However, when patients use antibiotics for a long period of time, it leads to antibiotics destroying the intestinal flora and causing disorders in its composition, thus causing the occurrence of digestive diseases. Or when patients drink unclean, poorly digested, too spicy, too cold stimulating foods can cause an imbalance of probiotics and digestive disorders. When patients have digestive disorders due to probiotic imbalance, they can solve the digestive problems by taking active bacterial drugs to regulate the intestinal flora and make it return to normal ratio, such as Bifidobacterium bifidum, Bacillus subtilis and so on. The use of probiotic agents should follow the doctor’s instructions for standardized treatment.