What is a fiber disease?

Morgellons is sometimes called the "fiber disease" by doctors. It is controversial and not-easily-understood condition in which strange thread-like fibers appear under the skin. Patients may feel as if something is crawling on, biting, or stinging them. Some experts believe Morgellons is a physical illness; others believe it is a kind of "delusional parasitosis," which makes a person think that parasites have infected his or her skin; and still others think it is simply a skin disease that occurs without a known cause.

There is no known cure for the condition. There are some possible links to Lyme disease and hypothyroidism, but much more research in general is needed for this condition.