Stool is a barometer of your baby’s health and can be judged by the state and duration of your baby’s stool. Blood in the baby’s stool is blood found in the baby’s stool, sometimes on the surface of the stool, sometimes mixed with the stool; sometimes blood is found on the tissue used to wipe the baby’s buttocks. When a baby has blood in his stool, it indicates that he may have a minor or major health problem. Blood in baby’s stool can be seen in anal fissures, diarrhea caused by viral or bacterial infections, intussusception, hematologic disorders, and also in milk protein allergy. If blood is attached to the surface of the stool, it is often caused by anal fissures. Babies often have constipation and examination of the perianal area reveals fissures. A small amount of blood in the stool, without fever, may be accompanied by a rash and respiratory allergies such as spraying and coughing, wheezing and other symptoms, considered to be caused by food allergies. Frequent, dilute watery stools mixed with a small amount of blood, accompanied by vomiting and fever, considered to be caused by viral infection. Pus and blood stools, frequent stools, accompanied by fever, consider bacterial enteritis. If there is blood in the stool or even jam-like stool, accompanied by soothing crying, you need to be alert to intussusception, and this situation needs urgent medical treatment. There are many causes of blood in the stool for babies, and the cause varies, as does the severity of the condition, such as intussusception, which is common in pediatrics and requires emergency treatment. Parents can initially determine the cause based on the characteristics of the blood in the stool and the number of times, but if they can’t determine the condition, they must seek medical attention in a timely manner.