The literal meaning of Shatkarma is cleansing. Kriyas are categorized into six and every one of them has a particular role to play as far as their cleansing action is concerned. The practice of Kriya is quoted with its subclassification in Hatha Yoga pradipika and Gheranda Samhita. However, in this theoretical scientific article, all varieties of Kriyas described in Hatha Yoga have been explained with its physiological effects. And the six kriyas are: Jal Neti: good for nasal passage ailments, like sinus, migraine, nasal passage blockage, etc. Dhauti: this will reduce extra pitta from our body. Kapalbhati: this will reduce extra 21 types of Kapha from our body. Trataka: this practice increases our concentration as well as reduce insomnia, depression, etc. An also helps to reduce our eye ailments. Nauli: reduce extra fat of the abdominal part. Also, it helps to reduce constipation. Basti: in a modern way also called enema. Cleans our large intestinal blockages.