I got the Ovira TENS unit a few weeks ago. My boyfriend ordered it for me after I mentioned that I saw it on instagram. And let me just sayÄ I. Am. Obsessed!!!! I've worn it during period pain, endometriosis pain, and ovulation pain. It has decreased my pain significantly! I'm no longer taking ibuprofen all day everyday. Today, I'm using it for Crohn's disease pain and it's helping me a lot. Besides helping my pain, I love that it can be worn easily under clothes. My heating pad can't go everything. But this thing can! I love it.