Since few months, I m having intense pain in lower abdomen left side before my period approx 2 days before and I have to take pain killer for that . This time I observed pain in naval area as well. Once I get my periods, I didn't feel any pain.also I think I observed a week before my period I feel pain naval area intermittently which is very mild and sharp needle pain on left hand side lower abdomen which comes n goes and stay for around 2 days. What could be the possibile reason for it.