Title: Lactose Intolerance (for Teens) - Nemours KidsHealth
Headings: Lactose Intolerance
Lactose Intolerance
Who Gets Lactose Intolerance?
What Happens When Someone Has It?
How Do Doctors Diagnose It?
Living With Lactose Intolerance

Content: Medicines. Certain antibiotics can trigger temporary lactose  intolerance by interfering with the intestine's ability to produce the lactase enzyme. Infection. After a bout of infectious diarrhea, some kids can  develop a temporary lactose intolerance that usually improves after a few days or  weeks. Age. As people get older, their bodies usually stop producing  the lactase enzyme, and most people will naturally become lactose intolerant over  time. What Happens When Someone Has It? People with lactose intolerance may have a variety of symptoms. It all depends  on how much dairy or how many milk-containing foods the person eats and how little  lactase the body produces. Usually within 30 minutes to 2 hours after eating, someone with lactose intolerance  will experience nausea, stomach cramps, bloating, gas, and diarrhea.