The medicated oil will get bonded with the waste materials in the intestine and also nourish those parts by the action of the sesame oil. The toxins could be easily removed after the proper preparations like snehana and swedana. By the action of the oil, it alleviates the imbalance of the apanavayu(the component of vata that is responsible for the functions like urination, defecation, menstruation etc.). And once vata is under control all the other doshas will be also in normal condition. The oil makes the intestines smooth and easy for bowel movements.