From past one month I have pain in the lower abdomen right side.. which is on and off .. sometimes the pain shows up on the hip bone and it's too sharp where I can not sit or pass loo also at times .. May I know the reason why I get this pain .. my monthly cycle is normal and I get periods on time . .. but my stomach is little sore .. I feel discomfort while sitting on chair .. Pls suggest what should be done..