Originally Answered: I have a ball python?
Sounds like she is cold.
how big is the cage
what kind of cage is it (aquarium, plastic bin, etc..)
HOW are you measuring the heat?
Do you have hides?
ok, for a 4ft bp, I've found they feed better and thrive (not just live or survive) better in a smaller cage, so a 2.5-3ft cage (I had a 5ft male, yes 5ft male, in a 3ft cage, and he started eating again after 9 months when I put him in there!)
Now go to wal-mart, yes, you can get a under bed storage bin and turn it into a bp wonderland, the opaque one's work great because ball pythons are naturally shy snakes.
drill about 5-8 holes in the long side, about 3-4 on the short side, put some of those black metal clips around the edges (those binder looking things you can find in stationary/school paper stuff) and use those to make sure the cage stays securely shut.
Go over to the paint section, close to there you should find the indoor/outdoor thermometers. Get one with a probe.
go to the lighting section, get a lamp dimmer.
When you get home plug in lamp dimmer, plug in heat pad to lamp dimmer, turn it down about 25%, put heat pad UNDER the cage (outside of it). Put probe INSIDE cage, over heat pad. watch temperature. Do NOT let it get over 95 degree's.
add newspapers (best because it's easy to clean, usually free, and actually holds moisture pretty good), water bowl, any decoration/climbing branches, and hides (remember put one hide directly over the heat pag).
Add snake. She can't burrow because there really isn't anything to burrow under. She may climb under the newspapers though. Both of mine loved to do that.
By the way, what kind of bedding are you using? ANY kind of softwood is bad (pine/cedar) it can cause respirtory infections. If you want a wood bedding the best kind to use is aspen SHAVINGS (not the kind that look like big chunks, the kind I'm talking about looks a bit like splinters, but are REALLY soft) or almost any kind of HARDWOOD shavings.