Do you pop a blister

No. This will most likely cause infection if done. If it really bothers you, you should go to a physician so they may drain it properly if it is causing major discomfort. Cover small blisters with an adhesive bandage, and large ones with a plastic-coated gauze that absorbs moisture. If you really don't want to go to a doctor : http://www.mayoclinic.com/health/first-aid-blisters/WL00008