Dairy products are enjoyed by people every day -- but if you're lactose intolerant, you may avoid consuming them because of digestive problems. Lactose intolerance symptoms do not cause any long-term damage, but they are uncomfortable, bothersome and could be embarrassing. A runny nose that develops after you consume dairy products is most likely unrelated to lactose intolerance, because lactose intolerance symptoms are exclusively related to the digestive system. A runny nose is a respiratory system symptom that may be related to a milk allergy.
Background
According to the National Digestive Diseases Information Clearinghouse, lactose intolerance is common among adults. As you age from childhood into adulthood, your body stops making as much lactase, the enzyme that breaks down lactose. Lactose is a sugar found in all forms of milk. Without enough lactase, you are not able to digest the sugar in milk, which can lead to gas, bloating, diarrhea and stomach cramping.
Runny Nose
A runny nose is not a symptom of lactose intolerance. If your sinuses are affected by consuming dairy products, you are most likely allergic to milk. A milk allergy is different than lactose intolerance because it isn't caused by the digestive system and isn't affected by the sugar found in milk. Milk allergy is the result of a hypersensitivity of the immune system to the proteins in cow's milk -- casein and whey. A runny nose, along with other respiratory symptoms, is commonly caused by a milk allergy. Talk with your doctor about testing to clinically diagnose your condition.
Lactose Intolerance Treatment
Treatment for lactose intolerance includes the use of medication, the avoidance of milk products and the use of lactose-free milk instead. Lactase supplements are available over-the-counter and can prevent symptoms from developing if taken directly before you consume dairy products. Some dairy manufacturers add lactase to dairy products during the manufacturing process, which converts the lactose into lactic acid.
Runny Nose Treatment
A runny nose resulting from a milk allergy may be treated with an oral antihistamine. Antihistamines restrict mast cells from creating histamine, which causes nasal irritation. Even if a runny nose is the only symptom you develop from ingesting milk, you should eliminate dairy from your diet. You are at risk of developing a severe reaction, such as anaphylaxis.
