Scar endometriosis is an uncommon entity. It is often misdiagnosed leading to unnecessary referrals. Gynecologists and general surgeons must be aware of this entity to avoid discomfort to the patient due to delay in diagnosis. We are presenting a case of scar endometriosis which was misdiagnosed initially. Detailed history of cyclic pain and swelling was the key point for the final diagnosis of scar endometriosis. Medical therapy was ineffective. Surgical excision of mass was the treatment for endometriotic lesion. This article is an attempt to create awareness of this condition among gynaecologists and general surgeons.