[Scope of Swedana] Sudation that is neither too hot (and unbearable) nor too mild (and insufficient), administered with suitable drugs and applied as per the disease condition, season and the diseased person in specific, at the affected and the indicated body part, is indeed effective.
Strong fomentation is indicated in a physically strong patient with severe illness in an extreme cold climate. In a weak person, mild fomentation and in a moderately strong patient, moderate fomentation is preferred.
वातश्लेष्मणि वाते वा कफे वा स्वेद इष्यते| स्निग्धरूक्षस्तथा स्निग्धो रूक्षश्चाप्युपकल्पितः ||८||
In vatakapha, vata or kapha-dominant, sudation technique is to be applied with the help of unctuous and dry agents, only unctuous agents or only dry agents respectively.
आमाशयगते वाते कफे पक्वाशयाश्रिते| रूक्षपूर्वो हितः स्वेदः स्नेहपूर्वस्तथैव च ||९||
[Mode of swedana as per site of dosha] When vata is located at the site of ama (amashaya or stomach), sudation is administered with dry agents and when kapha is located in the site of pakva (pakwashaya,or colon) , sudation is initiated with unctuous agents.
[Sensitive body parts for swedana] In the sensitive areas of testicles, precordium and eyes, sudation is not done or done very gently. Moderate sudation may be applied in the area of groins. In other parts of the body, sudation is done as desired.