Vaman Dhauti - an ancient Purging method for people suffering from acidity!

Preparing for Vaman Dhauti:

Vaman Dhauti is exercised First thing in the morning with empty stomach and the spine has to be all one line, no curving. straight when the Purging is happening.
Slightly heat 2-3 lit. of pure drinking water till it achieves the body temperature and put a pinch of salt in it. Initially, the proportion of salt can be kept a little high.
Start drinking this water sitting at one place.
Generally, nothing is felt till a liter of water is consumed.


Keep on drinking the water. Afterwards, the weight of the water is felt into the stomach, which gradually causes strain.
After intake of 1.5 to 2 liters of water, there is a nauseating feeling. Keep on drinking.
Drink it from a glass,  sip by sip, non stop, the purging is achieved by the amount of the water and the salt, first thing in the morning, so it has to be 1 1/5 - 3 lit. and it has to have a little salt it, a tiny spoon.
Ultimately, there is a feeling that no further quantity can be consumed and there is an intense feeling to vomit.
Try to consume another glass by keeping the feeling in check with mental efforts.
Then stand up with a distance of 1 to 1.5 ft in the legs and bend down slightly.
If necessary insert the fore or index finger, middle finger and the small finger of the right hand into the mouth and press a little at the end of the tongue (This aggravates the feeling to vomit).
The water in the stomach will come out in gushes.
Try to bring out the entire quantity by inserting fingers into the throat.
When the entire quantity of water comes out, the nausea stops and the feeling to vomit vanishes.
The whole process takes about 20-25 min.
Wash out the mouth and rest for another 15-20 min sitting in meditation or laying down in your bed.
You can have food only 1.5 to 2 hours after the process.

Physical Effects:

In this process, the stomach is filled with the water and then the same water is turned out from the mouth. Hence, the stomach and the esophagus are washed clean from inside. The impurities are thrown out. In the general digestion process, when the food and the water are consumed, they travel from the stomach to the small intestines and then absorbed into the blood. That means, poisonous substances when swallowed through the mouth or if generated in the stomach due to some internal problems, travel with the food to the small intestines and are absorbed into the blood in at least certain proportion. This process helps to bring out such poisonous materials. Also, the water drunk in the process includes salt. The osmotic pressure in the stomach is increased due to such water and instead of such water getting absorbed, the water in the blood gets absorbed into the stomach. Hence, the poisonous substances on the inner wall or lining of the stomach are brought into the stomach and thrown out along with the water.

Due to some sort of problem, certain poisonous materials or deformed juices are generated in the stomach after consumption of food. This hinders proper digestion. If this process is performed immediately after having food, such poisonous materials are thrown out of the body and they do not get mixed into the blood. This vamandhouti process is useful for patients suffering from acidity.

Precaution

This process cannot be learnt from reading it in a book. It should be learnt under the guidance of the expert and then may be performed independently when learnt properly. Also, like asanas and pranayama, this process should not be performed daily. It should be performed according to the need under the expert guidance.

People suffering from heart trouble, blood pressure - high or low, diseases of the nervous system, or trouble from ulcers, should not perform the process. It should be done under expert advice and to the extent prescribed by them.

While performing the process, the same amount of water as consumed should be thrown out. However, if the exact quantity is not thrown out, there is no need to get scared. The water then travels across the digestive track and is thrown out of the body by way of diarrhea. It does not cause any trouble to the body. 

Thank you for being well,
Aponi Noni

sources:
http://www.yogapoint.com/info/yogasana.htm
http://www.yogawiz.com/cleansing-techniques/cleansing-of-the-digestive-tract.html