Fascia are a connective tissue membrane just like tendons and ligaments. They do not have defined contours and connect the anatomical elements to each other. Although still often unknown to the general public, they are observed and highlighted for the first time in 1800 by Bichat and in 1936 by Solomon. Made primarily of collagen giving them a gelatinous appearance. They are divided into 3 interconnected layers: the superficial layer (present directly under the skin), deep (at the neck, thorax, abdominal and pelvic cavity) and the meningeal layer (mainly intracranial and composed of the hard mother, motherpatch and arachnoid). This thin fibrous membrane is translucent, malleable and envelops all body structures: muscles, bones, arteries, organs. They serve as a matrix, a support for the human body. They are found everywhere in the body ensuring a certain continuity between the different systems. Fascias are innervated and vascularized, and also allow - thanks to the tubular fibers - to allow passage to the lymphatic fluid. That's why it's important to have a therapeutic approach to them. In trauma, poor posture, dysfunction, or stress ... fascia will tend to retract, lose viscoelasticity. This loss of mobility (referred to as "adhesion") and this decrease in the slippage of the structures leads to an alteration of the vascularization and fluid intake that may be supplying acute or chronic pain, muscle cramps, digestive disorders, neuralgia, headache, tired... Over the years, the research has demonstrated the fascial contraction capacity. These could increase the body tension. The presence of sensory sensors in the fascia made it possible to demonstrate that the fascia is more sensitive to pain than the muscle.