Friend : “You said, to avoid indigestion at all costs, one must learn to sense bodily fire or digestive fire or different forms of fire within our body. How to sense digestive fire?”
Me: “I am still learning. However, I have two unwarranted advises. Follow if you trust me and experiment yourself.
Get connected with external form of fire first.
1) Perform homa daily.
2) Perform Surya Namaskar daily (not only the various poses of the exercise but actual worship in front of rising Sun)
Try it. Without any technical training, you will be connected with your bodily fire and understand it well!”
Btw, Germans and many Europeans do perform homa daily! Just in case if you wish mimic them 
