Milk protein allergy has the potential to recover on its own. Patients with milder symptoms can recover on their own without special treatment, but patients with more severe symptoms need medical intervention to treat their allergy. Milk protein allergy is an abnormal rejection reaction caused by the immune system mistaking milk proteins for harmful substances for various reasons. Due to individual differences, some patients have mild allergic reactions, such as rash and diarrhea, and the symptoms usually disappear gradually by stopping drinking milk. However, if the condition is more severe, such as severe eczema, diarrhea, vomiting or even choking, immediate symptomatic treatment is required, and desensitizing medication should be used as prescribed by the doctor while removing the allergen. Once milk protein allergy is diagnosed, the patient should immediately stop milk and its products. In the case of infants and young children who are breast-fed, their mothers need to avoid cow’s milk products; if they are formula-fed, they can use goat’s milk instead, or consume deeply hydrolyzed formula as soon as possible.