Case Study and Case Report 2024; 14(2): 9 – 12.

Daungsupawong S, Daungsupaong R. Case Report: Dengue Fever Presenting with Excessive Menstruation. Case Study and Case Report 2024; 14(2): 9 – 12. ABSTRACT Dengue fever, a viral illness transmitted by Aedes mosquitoes, is typically characterized by fever, headache, muscle aches, and rash. While classic symptoms are well-documented, atypical presentations can occasionally occur. This case report describes a 28-year-old female who presented to a private clinic with a 5-day history of fever, headache, and excessive menstrual bleeding as the primary complaint. Laboratory tests confirmed acute dengue infection with thrombocytopenia, and a rapid dengue test was positive for NS1 antigen. Menorrhagia in this patient was attributed to dengue-induced thrombocytopenia and increased vascular fragility. This case highlights the importance of considering dengue fever in the differential diagnosis for patients presenting with unexplained excessive menstruation, particularly in endemic areas. Although menorrhagia is not commonly reported in dengue, the vascular changes associated with the disease may contribute to bleeding complications. Early recognition and appropriate management are crucial to prevent progression to severe forms such as dengue hemorrhagic fever. Keywords: Dengue fever, Menorrhagia, Thrombocytopenia