I have had discomfort in my kidney area on and off today being particularly worse. This all started 6 weeks ago when I had overeaten and became extremely bloated with gas but could not shift it. Went on to have severe pains during the night in my upper stomach area which created discomfort when sitting and lying down. These pains seemed to move around into my back area and whatever way I tried to be, these moved in that direction too. I have had bouts of this in the past a couple of times however this was bad that night and I have since had another evening like that three weeks ago. These bad spells only happen at night however since the one three weeks ago, I felt bruised in my back area and this has now moved around my kidney area and is now quite uncomfortable. Feels like someone has kicked me. Please can you give me a possible idea.