Your cool side needs to be in the 78-82 range. 71 is much too cool, and because of that you may be seeing the beginning stages of a respiratory infection. If your snake is burrowing near the heat pad then it wants more warmth. If you do not have a thermostat to regulate the temp on your heating pad then your snake is in a dangerous situation. It's burrowing to close to an object that can heat up to over 120 and severely injure your snake. Look into the HYDROFARM THERMOSTAT on Amazon.com. Once you get your temps right and properly regulated then if the symptoms continue or worsen then it's time to see a reptile veterinarian.