Medical knowledge was available in ancient India at a very early stage. During the Harappan culture, the well-developed sanitary fittings of the Mohenjo-Daro dwellings, such as baths and drainage systems, suggest that people were more careful to keep their bodies clean to prevent infectious diseases. A variety of medicines have also been found in the site, such as wulin, a dark brown solution that treats indigestion, liver disease, rheumatism, etc.; bird quill bone, which can be applied externally to cure diseases of the ear, eye, throat and skin, and taken internally to open the stomach; antelope horn, deer horn, coral, and nympho leaves, etc., which can be used as medicine as well. At that time, people already knew that in the skull perforation, to treat headaches and other diseases, which is a difficult brain surgery, which shows that the medical technology and equipment has reached a fairly high level.