Physiologic diarrhea is generally common in breastfed babies, mostly at 6 months of age, and is manifested by a deficient appearance and can appear as eczema, which can occur shortly after birth. For infants with physiological diarrhea, medication is generally not recommended and targeted measures can be taken according to the cause. Physiological diarrhea is a natural physiological process that is caused by the presence of substances that inhibit lactase activity in the breast milk of breastfed babies, which can cause lactose intolerance in infants, thus causing diarrhea. If it does not affect the infant’s feeding and no other abnormalities occur, no special treatment is usually needed and the infant can recover on its own after some time. Diarrhea can also be caused by cold or overeating, so it is important to take better care of the baby to avoid the influence of environmental factors and to take some medications to regulate the gastrointestinal flora. If the diarrhea is more serious, you need to go to the hospital for treatment in time, you can take some Chinese medicine to regulate, and try to reduce or avoid the use of drugs. If the diarrhea is severe, you should switch to lactose-free milk powder, if it is not too serious, you can continue breastfeeding, you can supplement some trace elements to regulate the body immunity. Physiological diarrhea is a relatively common disease in infancy, and since infants have a special constitution, they must be taken care of and measures must be taken for specific symptoms.