Thera-fit is a wearable TENS designed for patients with fibromyalgia syndrome. It provides a drug-free pain relief whenever and wherever the patient needs thanks to its practical and cordless design. It aims to enhance their quality of life along with reducing the use of painkillers. It ensures a correct, easy, and stable positioning of the electrodes, and it provides an efficient TENS therapy on the neck and the back where contain the most critical trigger points cause to feel the pain most. It is composed of a garment with embedded textile electrodes, the detachable control unit, and the mobile app.