Primary dysmenorrhea denotes the onset of recurrent lower abdominal pain and uterine contractions throughout the bleeding phase of menstruation in the absence of any underlying pelvic pathology. Core stability exercise is considered a beneficial exercise program for managing several health problems. Various relaxation techniques can be used in womanhood with primary dysmenorrhea for relief of pain and improving their quality of life (QOL). The aim of this study was to learn and understand the benefits of core stabilization exercise along with relaxation techniques for primary dysmenorrhea in an unmarried girl. This single-case study was planned to analyze the effect of core stability exercise along with relaxation techniques in the management of primary dysmenorrhea symptoms. Relaxation exercises along with core stability exercises were given to subjectswith primary dysmenorrhea for 20 sessions of 30 minutes spanned for 5 weeks, four sessions a week. Along with the demographic profile, pre- and post -intervention value of pain in the visual analog scale (VAS) and Working Ability, Location, Intensity, Days of Pain, Dysmenorrhea (WaLIDD) score was obtained, recorded, and analyzed. This single-case study results showed significant improvement in the outcome of pain in the VAS and WaLIDD score after the intervention of core stability exercise along with relaxation exercise for the primary dysmenorrhea patients. Pre- and post-intervention of core stability exercise along with Mitchell’s relaxation exercises, measurements of VAS, and dysmenorrhea severity in WaLIDD scores revealed an effective reduction in pain and severity using core stability training and relaxation training in an unmarried girl diagnosed with primary dysmenorrhea.