Symptoms of infant formula allergy may include skin symptoms, respiratory symptoms, digestive symptoms such as rashes, coughing and vomiting. 1. Skin symptoms: Milk powder allergy may cause eczema on the child’s skin, which may be itchy and have small pimples on the skin. 2. Respiratory symptoms: milk powder allergy can also cause respiratory symptoms, such as coughing, nasal congestion and other manifestations of severe allergies may have laryngitis. 3. digestive symptoms: such as diarrhea or constipation, vomiting, nausea, etc., and in severe cases may cause blood in the stool. It is recommended that babies who drink milk powder have discomfort, should go to the hospital in time to improve the relevant examination, if it is milk powder allergy, you can replace the milk powder, follow the doctor’s advice.