The guasha tool…
Using light, gliding motion gua sha sculpts the face and neck muscles by reversing the effects of gravity. By improving blood circulation and with lymphatic drainage gua sha has the ability to reduce puffiness and under eye bags.
Improved blood circulation means increased flow of nutrients and oxygen which repair and renew the facial muscles and skin. At the same time, any existing puffiness or water retention in the face disappears as the lymphatic system is being drained of dead cells and metabolic wastes that build up. Use at night with your favorite toner and face oil.
You can follow this link for a basic tutorial.