This tool gets rid of my headaches when I use it on my shoulders and neck, and helps to relieve and relax any other sore areas on my body. It's great for achy feet, tight shoulders, sore backs, arms, and legs. You can literally use it EVERYWHERE and ANYWHERE! The portable bag makes it easy to carry with you wherever you go (in your car, in your suitcase, on vacation, etc.) and the battery lasts for hours. Thanks to this easy-to-use massager, I no longer have to worry about being sore for very long. A few minutes with it, and my tight muscles feel rejuvenated and ready to go again. This product has truly been a game changer for me, and I think anyone who puts strain on their muscles and bodies (especially those who do so on a regular basis) should have one. It's amazing!