Ushma sweda induced by heat from different sources it brings sweat on the skin through hair follicles by opening the pores of the skin. Swedana is an ancient Ayurvedic treatment which usually follows the Abhyanga treatment. It is considered as one among the poorvakarmas (preparatory procedures).
Usually the time period of Swedanam is till the patient gets proper sweating all over the body. Swedana liquefies the doshas, clears the obstruction of channels of circulation and directs the doshas to selective places from where they can be expelled easily.