Babies always fart, diarrhea may be gastrointestinal dysplasia, gastrointestinal dysfunction or lactose intolerance, etc., need to adjust the diet, avoid lactose and the use of medication, etc. for treatment. 1. Gastrointestinal dysplasia: babies always fart, diarrhea may be because the baby is too small, gastrointestinal dysplasia caused by the need to supplement the appropriate digestive enzymes, and try to eat small meals to reduce the baby’s digestive burden. 2. Gastrointestinal tract dysfunction: babies always fart, diarrhea may also be caused by cold and other gastrointestinal tract dysfunction, you can through a light diet, eat small meals, drink more hot water in moderation, do a good job of warmth and so on for treatment, if necessary, the use of probiotics such as bifidobacteria and other adjustments to the treatment. 3. Lactose intolerance: babies always fart, diarrhea may be caused by lactose intolerance, need to reduce the baby’s intake of lactose, such as reducing the intake of milk. Lactose-free milk powder can be replaced. Parents are advised to bring their babies to the doctor to complete the relevant examinations and standardize the treatment once they find that their babies are always farting and have diarrhea. The above medications should be used in accordance with medical advice.