Avagaha means immersion. Avagaha Sweda is sweating by immersion. Here, the patient is made to sweat while seated in a large tub. For treating diseases like hernia and painful micturition, warm medicated liquid is filled up to the navel and for cases of severe rheumatism or other disorders of the Vata Dosha, up to the neck. In some cases, a blanket is kept as a hood over the patient and tub to increase sweating.
The liquid used is usually water that has been boiled with anti-Vata herbs. Dhanyamla (see Dhanyamla Dhara) is also used.