Lactose intolerance, milk protein intolerance and a milk protein allergy -- each condition is different, but they can all cause similar symptoms from drinking milk. Milk protein can cause an intolerance that primarily affects the digestive system, or it can cause an allergic reaction that can affect various parts of the body. Lactose intolerance is an inability to digest the sugar found in milk that causes gastric symptoms.
Protein Intolerance
Milk protein intolerance is most common among infants and children under the age of 2. Milk protein intolerance is the inability to digest the proteins found in cow's milk. This is caused by a lack of enzymes that break down the proteins and allow them to be absorbed into the body. Milk protein intolerance causes vomiting, diarrhea, bloating, cramping and can make your child become very fussy. Most children outgrow this condition. A milk protein intolerance will not cause any other symptoms aside from digestive symptoms.
Lactose Intolerance
The cause of lactose intolerance is similar to a milk protein intolerance, in that the body lacks the lactase enzyme to digest the lactose. Lactose intolerance is a common condition but doesn't typically form until adolescence or adulthood. Because the lactose isn't digested and absorbed by the body, it makes its way into the large intestine, where it interacts with bacteria that cause common lactose intolerant symptoms. These symptoms include bloating, gas, stomach pain, diarrhea, foul-smelling stool and cramping.
Milk Protein Allergy
A milk protein allergy is not related to the digestive tract but is rather a reaction of the immune system. With a milk protein allergy, your body reacts to the proteins as if they are harmful. Common symptoms include hives, shortness of breath, wheezing, coughing, asthma, skin rashes, facial swelling, digestive issues and sinus congestion.
Treatment
The most effective way to prevent and treat these conditions is by avoiding the consumption of cow's milk. Lactose intolerance is treatable with an over-the-counter supplement that contains lactase. Taking this supplement directly before you ingest dairy can prevent symptoms from developing.
