question: I had systitis last week and ever since then I have had a dull ache in my torso, mainly in my back( left kidney area) which feels like it is bruised and all up along the left side of my rib cage. I also have experienced a sharp pain in the front of my abdomen which I thought mayb appendicitis but that has subsided. Any ideas what this could be?i have healthy lifestyle and diet and never get sick.