a casein allergy occurs when your body's immune system mistakenly thinks the protein is harmful and produces antibodies for protection. this triggers the release of body chemicals such as histamine that cause symptoms that may include: swelling of the lips mouth tongue face and/or throat. skin reactions such as hives a rash or red itchy skin. nasal congestion sneezing runny nose itchy eyes coughing or wheezing. the most serious reaction to milk allergy is called anaphylaxis. this is a potentially deadly reaction that happens rapidly. allergy to foods (including casein in milk) is believed to be the leading cause of anaphylaxis outside the hospital setting. people who have asthma in addition to a casein allergy may be at greater risk of having an anaphylactic reaction to food. symptoms such as swelling inside your mouth chest pain or difficulty breathing within minutes of consuming a milk product may mean you are experiencing an anaphylactic reaction and need emergency medical attention.
why do i get a reaction from milk because of my casein allergy?