This formula is designed by a master Chinese Herbalist. Our salve is the most superior Dit Da Jiao salve ever to be designed and made available for Therapeutic culture and marketplace. Blood is what delivers nutrients and healing to the tissues, and stuck qi and restricted tissues cause pain. This salve increases blood flow, warms, the area, softens tissues, moves qi, and reduces stiffness and spasm in tissues. Based on the ancient 'Dit Da Jiao' formula from Shaolin Temple, we've blended the best herbal botanicals from the extensive pharmacopeia of Chinese Herbology. This salve works almost immediately upon contact for discomfort that is better with heat and worse with cold. NOT FOR RHEUMATOID type arthritis.