According to the American College of Obstetricians and Gynecologists (ACOG), you can safely use a heating pad while pregnant. However, there are some steps you should take to prevent burns and minimize your risk of harm. “Heating pads should be set at the lowest possible temperature setting,” ACOG says. “Wrap your heating pad or warm water bottle in a towel to help prevent burns.” The organization also recommends limiting the amount of time you use a heating pad (or other forms of heat therapy).