Scar tissue can develop through many ways. The most common ways are through injury or repetitive stress. Your body will heal itself along the lines of stress, this process will create tissue that adheres layers that should glide. Scraping helps by breaking up the tissues, and allows the separate layers to move smoothly over the other. This frees up motion and helps restore your range of motion.
Scraping improves the blood flow to the treated area by applying a gentle a pressure over the area. The area will become red (but shouldn’t be bruised). The redness means that the body is directing increased blood flow to this area. That increased blood flow will allow the body to heal faster.
By improving lymphatic flow, scraping can help reduce swelling and promote the removal of toxins and waste products from the tissues.