I have removed 3 tan, cocoon shaped large larve-like spun fibers from my back shoulders, and countless hard particles that resemble a grain of sand from under my skin. I have been seeing a Dermatologist for 10 months with no improvement. She said it looks like bites. They started on the back of my right thigh, moved to my chest, upper arms, shoulders and upper back, then a few on my legs just below the knees. I don't think the dermatologist can help me. What can I take to rid my body of these paradites?