Blood in baby’s stool may be caused by food protein allergy, necrotizing small bowel colitis, acute gastroenteritis, etc. It needs to be treated according to the specific situation, and clinically it can be treated by medication and surgery. 1. Food protein allergy: babies eat food that may cause allergies, such as eggs, milk, etc., such food contains protein into the body, which can lead to allergic symptoms, need to stop the food feeding. If the symptoms are more serious, it is recommended to consult a doctor in time, improve the stool routine and other checks, if necessary, replace the depth of hydrolyzed milk feeding or fasting, intravenous high nutritional support therapy. 2. Necrotizing small bowel colitis: this disease is usually due to infection, premature birth and other factors, the disease is often more serious, can cause the baby stool with blood, abdominal distension, depression and other manifestations. First of all, the child needs to fast, combined with bacterial infection can be cefazoxime and other medications as prescribed by the doctor, if the disease progresses faster, the need for surgical treatment, such as resection of necrotic intestinal tubes after the enterostomy. 3. Acute gastroenteritis: acute gastroenteritis may be caused by infection with rotavirus, E. coli or improper feeding, etc., which can lead to diarrhea, vomiting, bloody stools and other symptoms, can be applied under the guidance of a doctor ceftriaxone, probiotics (such as Bacillus subtilis bacillus granules), montelukast and other drugs. There are many possible diseases of bloody stools in babies, such as enteritis, dysentery, etc. It is recommended to go to a professional hospital to clarify the cause of the disease, and then under the guidance of the doctor for further treatment.