It entirely depends on where you are using the pad. You use these pads on your hips, back, and joints for temporary pain relief. The pad’s warmth will help you with the pain for a short period. However, to keep in mind, you should not use heat pads on your abdomen while you are pregnant. One reason is that abdominal pain during pregnancy might be due to some severe condition, and you should talk to your doctor rather than using a pad for temporary relief. That being said, you can try using a towel soaked in a warm bath.