Why does my lower abdomen feel bruised?

Are my abdomen/internal organs bruised?

• A few nights ago, I tripped going up some stairs. I landed on my stomach and nothing hurts really, but a lone across my abdomen. It's around my 5th rib, and it's so sore, even just to sit up it hurts. Some muscles in my back around the same area has began hurting as well. Will my abdomen eventually bruise and are my back muscles hurting because they're trying to compensate for my weakness in my abdominal area?

• Answer:

  I would go to the doctor's office, because It sounds like you may have cracked a rib, or hit your liver really hard.