What kind of substrate, if any, are you using? I used a redish type of substrate myself when I started (when amateur) with my Python more that two years ago. I had a similar problem and I suspected the substrate. I took it away and my problem stoped. I now use a carpet like material, it's harder to keep it clean, but it sure is safer for the snake. You should see a vet to be sure that she gets proper attention. Good Luck.