Hi Komal, Welcome to HealthcareMagic Forum.
Do you have any abnormal vaginal Bleeding?You haven't mentioned since how long do you have this Problem? You are having Dysmenorrhea. The cause for this is Unknown or it could be due to Pelvic Inflammatory Disease
(PID) or Endometriosis
. You may want to get yourself examined by a Gynecologist to rule out the exact cause.
Apply heat pads when you have pain and get adequate rest.
Wish you Good Health.