Purification techniques were once an integral part of yoga and were practiced before the asana exercises. In classical yoga texts, six cleansing or purifying techniques of the aspirant yoga are described, which aim at physical and mental cleansing. We also know the cleaning techniques under the term kriya or even shatkarma.
Their goal is to purify the body and mind, i.e., remove toxins and negative thoughts that could stand in the practitioner’s way for his ultimate goal - samadhi (stopping the mind, contemplation). The primary categories of cleansing equipment include néti, dhauli, nauli, kapalabhati and tratak. You find the most well-known cleaning aids for individual techniques, such as tongue scrapers or nose rinsers.
Find out more in the article: Why it is beneficial to try cleansing techniques of SHAT KARMA or KRIJA