By Swami Harshananda
Nādiśuddhi literally means ‘purification of the naḍis’.
Nāḍīśuddhi means the purification of the nāḍīs, tube-like structures in the body. They have to be cleansed by certain processes before practicing prāṇāyāma. Works on Haṭhayoga describe two types of nāḍi-śuddhi:
- Samanu with bījamantras
- Nirmanu without such mantras
It is done in the proportion of 16:64:32 seconds, using such bījamantras as yarn, rari and lain. Of course, it goes without saying that these practices should be done under the direct supervision of a competent guru.
- Dhautis means cleansing processes.
- Gheranda Samhitā 5.33-45
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore