It is a process wherein the drug (medicated oils and liquid medicines) is administered through the nostrils. Since a nose is the gateway to the head, the therapy is highly effective in curing a number of diseases pertaining to the head, if it is performed systematically. The therapy cleanses and opens the channels of the head, which has a direct influence on the functioning of brain. The therapy is beneficial if done on a regular basis, because it keeps the eyes, nose and ear healthy. It also prevents the early greying of hair and beard. Nasya karma ensures the proper and healthy growth of hair.