Two-month-old infants with diarrhea are treated as follows: 1. Adjust the diet in time to maintain nutrition, no fasting is needed at this time; if the child eats breast milk, breastfeeding can be continued; if the child has severe diarrhea, stopping the diet can be considered at this time; 2. Pay attention to replenishing fluids and correcting water, electrolyte and acid-base disorders. Oral rehydration salts can be stored for 24h, and should be discarded after 24h. Maintaining water and electrolyte balance and avoiding electrolyte disorders are the key points in the treatment of diarrhea; 3. Actively search for the cause of diarrhea in children, some of them have physiological causes, some of them have digestive function problems due to dietary changes, and some of them are caused by viral or bacterial infections, which need to be treated with antibiotics; 4. If the child has an infection, it is necessary to actively control the infection inside and outside the intestinal tract, especially the bacterial infection, and it is necessary to use antibiotics reasonably. In older infants, intestinal microecological therapy such as probiotic Saccharomyces boulardii or mometas can be used. In severe cases of diarrhea, the intestinal mucosa protector montelukast can be used, otherwise the child is prone to intestinal mucosa destruction, leading to bleeding. If it is bacillary dysentery, avoid using montelukast; avoid using antidiarrheal drugs by supplementing zinc to stop diarrhea, increase appetite and strengthen resistance; 5, strengthen care, some children with diarrhea, redness of the buttocks or broken skin, need to pay attention to protection; at the same time, need to pay attention to prevent other complications, such as high fever; 6, avoid abusing antibiotics, some parents find that their children have diarrhea, then immediately use antibiotics, when the abuse of Antibiotics can aggravate diarrhea, and even intestinal flora imbalance, resulting in diarrhea difficult to treat.