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: A person may be or may become lactose intolerant for different reasons: Ethnic background. People of Asian, African, Native American,  and Hispanic backgrounds are more likely to develop lactose intolerance at a young  age. Other problems with the digestive tract. People who have inflammation  of their upper small intestine, such as celiac disease or Crohn's disease, have a  reduced level of the lactase enzyme. 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.