Ultrasounds are imperceptible mechanical vibrations which produce located effects on body structures (bones, muscles, tendons, ligaments, etc.). Its main applications are post-traumatic recovery of distorsions, tears and inflammations. In aesthetics they are often combined to others methodics, particularly for the treatment of cellulitis. The useful therapeutic effects are found in pain therapy, sport traumatology, orthopedic rehabilitation and anticellulitis treatments. The main contraindications are: pace-maker, pregnancy, tumours, intense osteoporosis, varicose, genital, bones in growth.