I want contribuite with my experience, I had similar clinical history than many of you, after similar symptoms and they didnt find any organic problem the doctor diagnosed "functional dyspepsia". I tried many things related with diet but nothing eliminated the problem.
I wanted start doing sport but I felt weak then I couldnt. Some years before I learned Qigong, an chinese exercise which is included in TCM, after start doing Qigong I felt much better. My Qigong exercise focused on breathing, I thought that somehow increase the oxygen uptake improve the functioning of the stomach, may be because tone up the nervous system. After this discovery I keep on practicing two hours per day, I felt better every day. When I felt strong enough I started going to run every morning and going to the gym at night, just now I felt very very well, almost fully recovered.
I try many many things and only exercise helped me. I think the most important aspect to take into account for overcome the functional dyspepsia is doing sport, we could be days and days speaking about theorys related with the body physiology but that is useless. For some reason people who suffer of functional dyspepsia has a altered the organs function, the body doesnt work as it should. Exercise stimulates blood circulation. When blood circulates better, all organs function better. It was very curious how after my job I felt everydays typical functional dyspepsia symptoms and these dissapeared after one hour at gym and I began to fell hungry again. I heard that stress has a strong effect on kidney, kidney retains blood and blood doesnt flow properly throught the body, also the autonomic nervous system is strongly affected preventing the normal functioning of organs, in this situation I think exercise could act as a pump stimulating the blood flow and the balancing of the organs.
In all traditional medicines the most important point for keep healthy is move the body. Just now I think the most strong stimulus for recover the healthy is doing exercise.
Another important point is changing lifestyle, the more relaxed lifestyle the best......
There is ample evidence that the medicines do not work for functional dyspepsia.
I am spanish, my mother language is not english then I couldnt express everything as I wanted, but I can give you all information you need if you are interested, WORTH IT.