In Ayurveda, Panchakarma is considered very effective Ayurveda method of treatment; the main purpose of the treatment is to detoxify the body. In this Therapy the body goes through continuous metabolism process and as a result of this process the waste products (toxins) present in our body are released. These toxins are known as 'Aam'. This aam is the main root cause for various diseases. The Panchakarma Therapy action removes Aam from the body in an efficient manner without any hostile effects on body. If we break the word Panchakarma in two words it bifurcates into 'Pancha' which means five and 'Karma' means Actions/Therapies. These are all "shodhan" therapies that help in cleansing of vitated doshas and bringing them to normalcy.
These therapies are known as "Pradhan Karma" that means "Main procedures". Some of them are: Snehan (Oleation/Massage) and Swedan (Steam) that should be done before Pradhan Karma therapies that's why these procedures are called Purva Karma. Purva Karma is a preparative stage for the main procedures; it brings the aggravated doshas in koshtha for their elimination.
Tune up with The Yogshala for further introduction about Pradhan Karma and Purva Karma Therapies.