Diarrhoea. You may notice that your baby begins to diarrhoea every five to six hours after feeding.
Gas. Your baby may become irritable and cry a lot because of a hard swollen tummy, resulting from slow digestion of milk proteins.
Weight loss. The baby may lose weight due to the difficulty in processing proteins and subsequent diarrhoea.
Abnormal vomiting. You may also notice that your baby vomits heavily two to three hours after feeding. Hives. These are acne-like spots on your baby’s face. These occur because of accumulation of unused proteins that start appearing on the surface of the baby’s skin.
Bloody stool. Your baby may also begin to pass a bloody stool because of gastro intestinal infection caused by the intolerance to milk.