A topical lotion that provides fast-acting, water resistance pain relief from arthritis, joint aches, muscle aches, tennis elbow, bursitis and more.
11 Best Heating Pads for Cramps to Help Relieve Period Pain – Cosmopolitan
However, Dr. Jones recommends placing a heating pad on your lower abdomen or lower back, as this is usually where you'll feel period pain the most.
Source: back pain