Shatkarma

Shatkarmas - Cleansing Techniques
Those shatkarma which effect purification of the body are secret. They have manifold, wondrous results and are held in high esteem by eminent yogis.
(Hatha Yoga Pradipika 2:23) ...

Shatkarma (Sanskrit: à¤-टà¤-रà¥�मन á¹£aá¹­karman), also known as Shatkriya[1], refers to the Yogic practices involving purification of the body.

Cleansing Processes (Shatkarmas)- Hatha Yoga
Hatha Yoga describes Shatkarmas (six processes) in details for Body purification and mind purification.

Shatkarma
the six yogic techniques of purification of the body, viz. neti, dhauti, nauli, basti, trataka, kapalbhati
Sheetali pranayama ...

Shatkarmas according to hatha yoga are the six yogic cleansing processes of the body- Neti, Basti, Tratak, Kapalabhati, and Nauli.

Shatkarma Or Shatkriya
six cleansing techniques of Hatha Yoga: neti, dhauti, nauli, basti, trataka, kapalbhati
Shankaracharya ...

a shatkarma technique - also referred as the short intestinal wash. Involves the drinking of several glasses of water and the expelling it through stool after a series of exercises (asanas); ...

cleaning the conch; shatkarma that uses saline water to clean the small and large intestines
Shankha mudra
- ...

The bulk of this text details the techniques of the main practices of Hatha Yoga: Asana (postures), Pranayama (breathing exercises), Shatkarma (internal cleansings), mudra (energy seal), and Bandha (energy locks).

They are also called shatkriyas or shatkarma because they are six in number. These include:
Neti, which is used for cleansing the nasal passage with water, a linen thread, or rubber catheter.

Hatha yoga is particular type of yoga which focuses on the shatkarma, which is the purification of the physical as leading to the purification of the mind and of the vital energy.

Trataka One of the cleansing techniques (shatkarma) in which the gaze is focussed upon an object such as a candle flame.Turiya Literally, the "fourth," being the fourth state of consciousness, beyond waking, dreaming, and deep sleep.

they should be purified and then Pranayama should be practised. The Nadis are purified by two processes, viz., Samanu and Nirmanu. The Samanu is done by a mental process with Bija Mantra. The Nirmanu is done by physical cleansing or the Shatkarmas.

See also: Yoga, Prana, Pranayama, Body, Asana