I am a 30 year old male with no major medical problems. Last week, I went to bed feeling fine other than having loose stools. I awoke the next morning very quickly and got out of bed. Suddenly, I felt a sharp pain toward the left side of my ribcage. It would hurt only when I would take a deep breath. The best I could describe it is the pain you get sometimes when you run and don t breathe correctly and your side hurts. I also felt bloated and full, yet I thought it was because of how I was feeling the night before. It s been 4 days now and the pain has reduced 95%. It doesn t hurt now however, its very dull almost non existent. However, it just feel 100% normal right now (this could just be all in my mind). My stools have ranged from loose to solid, yet I don t have any stomach pain. Did I pull a muscle? What can this be?