Circulation and blood flow will increase to a part of a body to which heat is being applied. This can help muscles and tissues relax and so relieve pain. Moist heat may work faster than dry heat. DMI's electric heating pad offers two options: Like most heating pads, you can use it for dry heat, or you can dampen the foam insert and place inside the washable cover to produce moist heat. Heating pad produces temperatures ranging from a low of 81° to a high of 151°.