Instrument Assisted Soft Tissue Mobilization (IASTM) is a popular treatment for myofascial restriction. IASTM uses specially designed instruments to provide a mobilizing effect to scar tissue and myofascial adhesions. Increases blood flow, improves range of motion, stimulates new and better quality collagen, speeds up recovery time. Reducing inflammation. Some pain is expected but can be reduced by reducing the pressure, communication with your physiotherapist is crucial. There might be some bruising the day after the treatment.