We need a lot more info:
1. Is your BP a morph?
2. What type/size cage are you using?
3. What are you using to heat the cage?
4. Is your heat source regulated in any way? If so how?
5. What are you using for substrate?
6. Have you treated for mites?
7. Have you changed any thing in the cage or around the cage?
8. Have you sprayed anything around the cage or used any chemicals?
9. What are your current cage temperatures/humidity, and how are you measuring them?