Some people online believe many of us have dangerous parasites in our gut and need to flush them out with herbal supplements. Here's what doctors say about the trend.

But in some cases, the parasite reaches the nervous system and causes a form of meningitis called eosinophilic meningitis. That can mean headaches, stiff neck, nausea, vomiting, fever, strange ...

Parasites are organisms that survive by feeding on humans and other hosts, often causing mild to severe health problems. They can enter the body in multiple ways, including consuming contaminated food ...