What if it felt like there were tiny bugs crawling all over your body, causing oozing sores and mysterious fibers sprouting from your skin? That's how many people described their symptoms to government doctors several years ago, with health officials sometimes receiving up to 20 calls a day from sufferers.
Many of these people lived in California, prompting one of that state's U.S. senators, Dianne Feinstein, to ask for a scientific study. In 2008, federal health officials began to study people who said they were affected by this freakish condition called Morgellons disease - named from a 1674 medical paper that described similar symptoms.

