Milk protein allergy causes constipation treatment methods are: 1, prohibit the use of milk-based formula, it is recommended to use deeply hydrolyzed or amino acid formula instead; 2, if the baby is 6 months or more, can not accept deeply hydrolyzed formula, you can also choose soy-based formula; 3, after a period of avoidance, the baby’s symptoms of milk protein allergy can be alleviated, if it is still constipated, you can also add some appropriate probiotics, constipation can be serious children can also take appropriate lactulose to treat.