High-quality terahertz massage tool. Made from terahertz crystals, this massage tool is ideal for stimulating circulation, increasing lymphatic drainage, and reducing inflammation. Terahertz crystals emit a unique frequency that penetrates deeply into the skin, promoting cell regeneration and restoring balance to energy systems. Regular use of terahertz GuaSha can help reduce the appearance of wrinkles and fine lines, improve skin texture and tone, and give it a healthy glow. An ideal addition to the daily skincare routine. Terahertz is a man-made mineral, created by extracting silica from quartz and sand. Japanese scientists discovered that this mineral naturally emits a powerful far-infrared wavelength, called Terahertz wave, known to be deeply beneficial.