Background: Morbidity due to dysmenorrhea represents a substantial public health burden. It is one of the leading causes of absenteeism from school/work & is responsible for diminished quality of life. Despite high prevalence & associated negative effects, many women do not seek medical care and yet it remains poorly understood. Aim: To find a proportion of primary dysmenorrhea in adolescent girls and its impact on QOL. Objectives: To study about the associated symptoms of dysmenorrhea, its severity & health-seeking behaviour and to analyse the impact of dysmenorrhea on QOL. Method: 100 subjects between 13-19 years were recruited by convenient sampling. The subjects were explained about the study procedure; informed consent was taken & was assured of confidentiality. A pre-validated structured questionnaire was developed based on a pilot study and thorough review of relevant literature which included demographic details, awareness of the term dysmenorrhea, severity, type of pain, associated symptoms, health-seeking behaviour, habits, and impact of dysmenorrhea on their lives. Results: 78% of the study population suffered from primary dysmenorrhea. Associated symptoms were disgusted irritability (50%) and emotional instability (33.33%). Reduced concentration in the classroom (62.82%) and missing school or college (38.46%) were the commonest domains impacted because of dysmenorrhea. Conclusion: Present study showed a high proportion of dysmenorrhoea in adolescent girls and is associated with a variety of physical and emotional symptoms leading to decreased QOL. Clinical implication: The physiotherapist can focus on improving the quality of life of adolescent girls suffering from dysmenorrhea by various health promotion strategies.