The invention concerns an orthosis (1) for preventing and treating hypertrophy (22), keloid, bridle, scar retraction, to improve functional and aesthetic quality and enable scar growth. Said orthosis (2) enables to enhance [sic] the quality of healing, to decrease the number of repair surgical procedures for functional purposes. It provides the patient with more aesthetic movements. Said orthosis is characterized in that it comprises one or more treatment units (2) having a mechanical pressing action (13) on the scar and an activator (3) for enhancing the action of the units (2), for increasing their attachment, for transmitting traction derived from the patient's movements.