A baby who has diarrhea but is in good spirits indicates that there is no food poisoning, serious infection or dehydration, as diarrhea caused by these conditions is usually more severe and can cause depression. If the diarrhea but the spirit is good, consider the diet, temperature changes or mild infection, but still need to observe and pay attention to avoid the development of serious conditions. A, dietary factors: 1, not regular and quantitative feeding: baby needs a stable feeding environment, feeding irregular, variable amount easily cause baby indigestion, thus diarrhea, so parents need to pay attention to feeding to regular and quantitative; 2, food intolerance: breastfeeding when the mother does not pay attention to diet, often eat some greasy food or seafood, etc., may cause milk composition changes, resulting in baby diarrhea The degree of diarrhea is generally light, and the baby is in good spirits; artificial feeding when adding complementary foods too early, too high concentration of milk powder, or too early exposure to a large number of starchy, fatty ingredients, can cause the baby to food intolerance, resulting in diarrhea. The transition of baby feeding should be slow and steady, following the principle of gradual scientific progress from less to more, from thin to thick, from fine to coarse; 3. Allergy: some babies belong to allergic constitution, may be allergic to more foods, if parents fail to find allergens in time, there may be frequent diarrhea, when the intake is less, the symptoms are mild and the mental state is still good. At this time, parents need to carefully identify exactly which or which foods lead to allergies, and after discovery should avoid eating foods that lead to allergies, so as not to aggravate diarrhea; 4, digestive enzyme deficiency: may be primary or secondary, the baby is too young intestinal development is not sound, or because of lactose deficiency disease, resulting in intestinal digestion and absorption of food to reduce the ability to cause baby diarrhea, need to go to the hospital Clearly. Second, the temperature factor: because of changes in temperature, such as sudden cooling, overheating, abdominal cold and other circumstances, resulting in the baby’s intestinal peristalsis increased, digestive fluid secretion disorder, thus inducing abnormalities in the baby’s digestive system, resulting in diarrhea. So families should pay attention to maintain the appropriate temperature when taking care of the baby, not too cold and too hot, hot and cold, the baby is more sensitive to external stimuli, which can easily lead to disease. Third, mild infection: bacterial, viral and parasitic infectious diseases of the intestinal tract, if not serious, can also cause the baby has been diarrhea but good spirit, such as E. coli infection, rotavirus infection, flagellate infection, etc.. Watery diarrhea generally does not use antibiotics and can be treated with probiotic therapy, such as bifidobacterium and lactobacillus acidophilus. Those with severe symptoms or dehydration should go to the hospital promptly for treatment.