I'm diabetic;58 yrs old. scabies for 13 years. docs never believe me. they crawl out of my mouse and bite my fingers on the keyboard. can't get rid of?

I wouldn't either: They are burrowing bugs, not biters. The itch & rash is a reaction to poop they leave in their burrows, not their bites. Treating the wrong problem is unlikely ever to fix it.

Dilusion parasitosis: The doctors are right not to believe you. What you describe is impossible. You may or may not have scabies: probably not, but if so, it's not from mites living in your computer mouse or keyboard. Probably you have dilusional parasitosis. http://delusion.ucdavis.edu/delusional.html Discuss with your doctor, and try to be open to the probable psychological explanaiton. Good luck!