i have a sharp pain in my left lower side that hurts for a few seconds. i was wondering what it might be? i cant reproduce it on my own by excercise,it just comes when ever it wants even if im just resting. no other symptoms either just pain. also i am 32 with extreamly high blood preassure and cholestrol. my doctor said it might be my lungs hitting something to cause the pain but i dont think so. is there something i should do