Milk allergy is a reaction by the body's immune system to one or more milk proteins and can be life-threatening when just a small amount of milk or milk product is consumed. Some symptoms of milk allergy can be similar to
lactose intolerance symptoms (i.e. gas, bloating, abdominal pain).
Lactose intolerance is not a milk allergy; it is the inability or
insufficient ability to digest lactose, a sugar found in milk and milk
products. People with lactose intolerance may experience abdominal pain,
abdominal bloating, gas, diarrhea, and nausea after consuming products
containing lactose.
Most people with lactose intolerance can tolerate some lactose in their
diet. Gradually introducing small amounts of milk or milk products may help
some people adapt to them with fewer symptoms.