Always follow the natural path while practicing Reiki. We eat food that gets digested in the stomach and it produces energy for the body to function. The waste is also discharged on regular basis. Similarly it is a good practice to start Reiki at Solar Plexus and then move on to giving Reiki to the problem areas and then finally close at kidneys. This natural path will surely produce better results. Give it a try and experience for yourself before accepting the idea.