10 Milky Mysteries Unveiled: The Sneaky Suspects Behind Lactose Intolerance

9. Acute Gastroenteritis (Post-Infectious Lactose Intolerance)

A severe bout of acute gastroenteritis, often caused by viral (e.g., rotavirus) or bacterial infections, can surprisingly lead to temporary lactose intolerance. The inflammation and damage to the small intestine lining from the infection can temporarily reduce lactase enzyme production. This "post-infectious lactose intolerance" is usually transient, with lactase levels typically recovering as the intestinal lining heals over weeks or months. However, awareness is key, as reintroducing dairy too soon can prolong discomfort and recovery.

10. Certain Parasitic Infections

While less common in many Western countries, certain parasitic infections of the gut, such as giardiasis or cryptosporidiosis, can also be sneaky causes of temporary lactose intolerance. These parasites directly damage the small intestine lining, interfering with its ability to produce lactase. If you experience persistent digestive issues including lactose intolerance-like symptoms after traveling to areas where these parasites are common, or after exposure to contaminated water, seeking a diagnosis and treatment for the underlying infection is crucial to resolve the intolerance.