THERAPEUTICULTRASOUND: Ultrasound has three properties: thermal, mechanical and electrical. It works at a frequency of 1-3MHz. It has a pulsed or continuous emission. It is used depending on what the therapist wants to achieve. Hyperemia, acceleration of microcirculation, increase of elasticity of collagen structures is achieved. The physiotherapist applies gel to the patient's area and moves the head around the affected area. This is a non-invasive treatment and is used to reduce muscle spasm.