Milk allergy is often confused with lactose intolerance because you can have the same digestive symptoms, like bloating, gas or diarrhea, with both. While a milk allergy is an immune system reaction to milk protein, with lactose intolerance the body can’t digest lactose (milk sugar). Lactose intolerance doesn’t cause an immune system reaction, so although it can cause discomfort, it’s not life-threatening.

If you suffer digestive problems after eating or drinking milk or dairy products, talk to your healthcare professional about a simple blood test.