Thank you for your question. I am not a veterinarian and can't diagnose advanced health issues. Your python could be suffering from a disease called Inclusion Body Disease (IBD). It is known to affect boas and pythons. This is a viral disease, and can be detected through blood work. Here is a link to more information about the disease:
Another possibility is the result of a genetic mutation that is present in spider morphs of the ball python. Here is a link to a discussion of this condition:
I recommend that you take your snake to an experienced reptile veterinarian to have it examined. If you are not familiar with reptile vets in your area, you can go to the Association of Reptile and Amphibian Veterinarians website:
At the top right hand corner of the page you will see a link that says "Find A Vet". You can go to this page and enter your address or zip code and obtain a list of veterinarians that belong to this association and have experience treating reptiles and amphibians.
I hope this information helps, and thank you for contacting Ask an Expert.