Food intolerance is a term used to describe a condition that occurs in individuals who have difficulty with the digestion of certain types of food. This difficulty does not stem from any form of food allergy caused by an individual's immune system activity. Food intolerance is a form of hypersensitivity that does not involve the activation of histamine response. The most common types of food implicated in food intolerance are gas-inducing foods, dairy products, and foods that contain gluten.
Bloating is a common problem that happens in individuals who are sensitive to dairy products containing lactose. Dairy intolerance occurs because the affected individual's body lacks the enzyme required to break lactose down, and when this substance is not broken down, it is left to be eaten by the naturally occurring bacteria in the gut. This process of bacterial digestion of lactose causes the production of gaseous byproducts in the digestive tract that causes bloating.