7 months baby diarrhea can be seen in infectious diarrhea, non-infectious diarrhea (such as bait diarrhea, etc.), there is no quick fix, need to be intervened according to the cause, such as rehydration, regulate intestinal flora, change milk powder. 1. Infectious diarrhea: such as rotavirus enteritis, diarrhea symptoms, accompanied by vomiting, fever, and in severe cases, signs of dehydration such as decreased urine output. For this kind of baby disease is mostly self-limiting, treatment needs to be active symptomatic supportive therapy, such as the use of intestinal mucosal protective agent (such as montelukast) and microecological agents (such as Saccharomyces boulardii) to relieve diarrhea symptoms, oral rehydration salts, oral rehydration salts, for dehydration is serious need for intravenous rehydration therapy. 2. Non-infectious diarrhea (1) bait diarrhea: the above performance can occur, often with mild symptoms, mostly caused by improper diet, need to pay attention to adjust the diet, if necessary, oral Clostridium Typhimurium and other treatments. (2) Lactose intolerance: due to insufficient lactase enzyme in the intestinal tract, the lactose component in the food cannot be digested, the above manifestations may occur, and in severe cases, weight loss may occur. For the treatment of formula milk-fed babies, lactose-free formula milk should be used as appropriate, and breastfeeding can be taken orally with lactase enzyme. (3) Milk protein allergy: these babies often have eczema, due to the weak barrier function of the digestive tract, the above phenomena may occur, some may have bloody stools, the need to avoid protein foods, formula milk, if necessary, the need to use hydrolyzed protein formula milk and so on. All of the above medications should be used under the supervision of a physician, and it is recommended to consult a specialist for treatment.