I suddenly felt a little pain in my left diaphragm that is the last rib on the left side last night. I didn't pay too much attention but now the pain is still there and has increased .it is a dull ache in that area. Other than that I feel no problem at all just that I haven't passed motions since the last two days. I have exams in a couple of days .please help me with my condition. What can be the possible causes and how do I treat it easily at home.