The Thermacare Menstrual is a self-adhesive patch that can be applied to the lower abdomen. With the help of rubbing and a little shaking of the patch, it warms up on its own. After about 30 minutes, the desired warmth is reached and keeps the area warm for up to 8 hours. All ThermaCare patches contain natural ingredients that react with air and generate heat (when the airtight packaging is opened). Thanks to this generated heat, the patch can be ideally used for period pains. The heat has a relaxing effect on the muscles and can thus relieve the cramping pain during menstruation. Thermacare Menstrual is odourless and contains no medicinal substances.