Title: Is Sudden Lactose Intolerance Possible? | Livestrong.com
Headings: Sudden Lactose Intolerance: What You Should Know
Sudden Lactose Intolerance: What You Should Know
Video of the Day
Understanding Lactose Intolerance
Detecting Lactose Intolerance
Is This an Emergency?
references

Content: You can indeed develop lactose intolerance as you age, and it can be temporary or permanent. Video of the Day
​ Read more: ​ Lactic Acid & Lactose Intolerance
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Understanding Lactose Intolerance
There are four types of lactose intolerance and, according to Mayo Clinic and the National Library of Medicine, here's how these causes of lactase deficiency shake out: ​ Primary ​. This type is inherited and starts young, but some people do not recognize it until they are adults. ​ Congenital ​. Also genetic, this type of  lactose intolerance occurs when both parents have a genetic mutation. ​ Developmental ​. Developmental lactose  intolerance is typically a temporary condition often found in premature  babies whose small intestines are not well developed. ​ Secondary ​. This type can occur at any  age and can be temporary or permanent. Advertisement
People who have low activity in lactase enzyme, which breaks down lactose, can experience sudden lactose intolerance. That is, you could become less tolerant in the event that your body experiences large intestinal changes, explains Dennis Savaiano, PhD, a nutrition professor at Purdue University, West Lafayette, Indiana. Those changes, according to Mayo Clinic, produce secondary lactose intolerance, which occurs when the small intestine's production of lactase decreases.