Gua Sha tools help to stimulate blood and lymph fluids through the dermis assisting natural detox systems. This creates a flow of hydration and oxygen through the stratum corneum, flushing away toxins and inviting nourishment on a cellular level. Cool stone assists with relieving inflammation and reducing puffiness...plus it's just bliss for tired tendons around the eyes. Warmed stones can help to soothe strained or pulled muscles. Combs and brushes work best for feet-ankles-legs and hands-wrists-arms. Always work at a pressure that helps you relax and never break the skin.