By Swami Harshananda
Works on the Haṭhayoga describe eight kinds of kumbhaka, the second of the three steps of prāṇāyāma. Out of these the suryabhedana is also the one. The air that is inhaled through the right nostril, after closing the left nostril, should be retained until one feels that it fills up to the tip of nails and hair. This is called suryabhedana. It destroys disorders of wind and worms also. The technique has to be learnt from experts in the field.
- Gheranda-samhitā 5.46 onwards
- Haṭhayoga- pradipikā 2.44
- Wind is also called vāta.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore