Symptoms of milk allergy are as follows: 1) skin and mucous membrane symptoms: mucous membrane allergy is manifested by itchy nose and eyes; 2) gastrointestinal symptoms: such as nausea, vomiting, dry stools, diarrhea, bloody stools, bad breath, refusal to eat milk; 3) respiratory symptoms: such as cough, runny nose, sneezing, asthma, etc.; 4) neuropsychiatric symptoms: such as restless sleep at night, night cries, and difficult to soothe, some children may appear emotional and behavioral Some children may have abnormal mood and behavior, such as irritability, irritability, etc. Once the above symptoms appear, you should go to the hospital in time to make a clear diagnosis and treat the symptoms.