Babies with blood in the stool but in good spirits may be related to enteritis, lactose intolerance, milk protein allergy, etc. Whether treatment is needed requires further comprehensive judgment before deciding. 1. Enteritis: most of the above conditions in infants are due to bacterial infection caused by enteritis, in the early stage of the disease may appear a small amount of blood in the stool, generally does not affect the baby’s state of mind, so parents can try to closely observe the development of the baby’s condition, but also under the guidance of the doctor using probiotics such as bifidobacteria and other help to regulate. 2. Lactose intolerance: because the baby’s intestinal function is not well developed, so some of the lactose molecules of breast milk can not be fully absorbed, resulting in frequent stools or blood in the stool, if the baby confirms that the state is very good, the parents can continue to observe the stool situation, if there is lactose intolerance, then you need to add lactase to the baby to improve. 3. Milk protein allergy: babies with blood in the stool and good mental state can often be seen in milk protein allergy, and can be stimulated to avoid the test to make a clear diagnosis. If diagnosed, amino acid milk powder or deeply hydrolyzed protein milk powder can be given. There may be other reasons for your baby to have blood in the stool, such as functional constipation, rectal polyps, etc. It is recommended that you go to the hospital for relevant examinations and cooperate with the doctor for active treatment. The above medications should be used in accordance with medical advice.