Morgellons disease causes black, white, red, or blue fibers to appear under the skin or protrude from it. People may also feel like something is crawling under their skin. The exact cause is unclear, ...

Dust mites belong to the arthropod family. They’re related to ticks and resemble insects but lack wings and eyes. Dust mite reactions are typically harmless, though they can cause swelling, itching, ...

Morgellons disease causes black, white, red, or blue fibers to appear under the skin or protrude from it. People may also feel crawling, stinging, or biting sensations in their skin, joint pain, and ...