For asthma I have heard that you should do this before going to sleep: Warm up some olive oil in a pan. Then after it is slightly warm, Dip into it some betel leaves (also known as paan leaves) only a little bit of olive oil should br used Place the leaves on the stomach and chest. Wrap over now in newspaper (not tightly. This is just to hold them in place & any excess oil will be absorbed . Please do not do this tightly as breathing will then be restricted. Then sleep for the night whilst this is on and breathing will become easier God willing, as the natural properties of the betel leaf will help in clearing the lungs