Breastfeeding in newborns that results in blood in the stools requires that the mother be instructed to avoid the diet and, if necessary, intervene by suspending breastfeeding and switching to special formulas. Newborns are prone to allergies due to immaturity of the immune and digestive systems, as well as genetic susceptibility and sensitivity to certain foods (e.g. eggs, milk, fish or nuts). For newborns who are breastfed, certain antigenic components are passed to the baby through milk secretion, resulting in allergic reactions, which may manifest as diarrhea and other symptoms, may be accompanied by bloody stools, and some babies may also develop eczema. Such babies can continue to be breastfed for the time being, and their mothers should be instructed to avoid suspicious foods, such as milk, eggs, beef or fish, and to observe the baby’s bowel habits. If the baby’s diarrhea and bloody stool symptoms do not improve within three days, you need to suspend breastfeeding, and under the guidance of a physician to use special formulas, such as deeply hydrolyzed protein formula, amino acid formula, and so on. Newborn breastfeeding caused by blood in the stool is recommended to consult a specialist physician according to the baby’s condition comprehensive judgment, guidance feeding.