These sound like the genuine "bad mites." Can you get a picture?
Best recommendation is to put her in a hospital tank (a simple container with only paper towels and a bottlecap of water for moisture) and see if you can remove any of the mites with a Q-tip. Sometimes they hang on pretty hard, so it may be difficult to achieve this without stressing your scorp too much.
See if you can find any predatory mites. Check your other tanks (forest tanks especially) for small mites that are larger than those on your scorpion's joints and run around on the soil. These guys eat the bad mites. Gather as many as you can (with a small paintbrush or some similarly delicate device) and put them on your scorpion. Hopefully they'll curb the population of the bad guys.
Best of luck! Let us know what happens.
Oh, I almost forgot -- keep this female away from any other scorpions you may have to prevent the mites from spreading.
