Most Ayurvedic therapies are made from chemical compounds taken from plants, from minerals, and from metals. In ancient India, Ayurvedic texts gave explanations for surgeries and for the stitching of wounds to help wound healing. The ancient Indians knew how to take out kidney stones and how to do rhinoplasty (plastic surgery for the nose). People have used many different Ayurvedic therapies through the history of India. Ayurveda has changed for more than two thousand years. In the 1970s and 1980s, Ayurveda also changed for consumption in the Western world.