Thanks for your reply. I'm completely new to snake care. My son went off to college & left me with his Ball python. He/she seems healthy, and has grown quite a bit in the past few months He's about 2' long. I believe it's a 10 gal tank, wood chips on the bottom, water dish in one corner, fake plant, large log, stone 'house'. We heat with a 40 watt bulb & the temperature is 75 at the moment. I just noticed a few small blisters on his back. We live in a dry climate & it's rather cool at night. I have no idea how often to clean his cage. He seems to shed on a regular basis. My only instructions were to mist the tank with a spray bottle now & then & feed him a mouse once a week.