Women who experience pain in their small abdomen a few days before their period may be experiencing pain during ovulation. During ovulation, the follicular fluid will seep into the abdominal cavity and irritate the abdominal wall, resulting in pain in the small abdomen, but usually only on one side of the small abdomen. It may also be caused by gynecological diseases, such as endometritis, pelvic inflammatory disease and adnexitis. The pelvic tissues are stimulated by the inflammation, and painful symptoms may occur. The pain may also be caused by spasms in the pelvic muscles due to a cold in the woman’s abdomen. If a woman experiences severe pain in the small abdomen, she should go to the hospital for an ultrasound examination to clarify the cause.