Background:- Premenstrual syndrome is the form of a combination of physical, psychological, and behavioral abnormalities during the luteal stage. This condition affects 75 percent to 90 percent of women before their menstrual cycle. The condition often begins 6 to 12 days before menstruation and seems to last 2 to 4 days following menstrual flow. It is one of the serious issues affecting females. This study concluded the effect of core muscle strengthening on premenstrual syndrome.