Low Platelet Count and Hematocrit as Risk Factors for Alopecia in Dengue Fever: A Retrospective Analysis

This study investigated the epidemiologic and clinical characteristics of patients with dengue fever complicated by alopecia. Of the 1,302 patients diagnosed with dengue fever at a tertiary hospital in Guangdong Province between September 2024 and December 2024, 15 were identified with concurrent alopecia. Clinical data from these patients were systematically analyzed along with relevant literature. The incidence of dengue fever with alopecia was approximately 1.15% and occurred predominantly in females (93.33%). Hair loss most frequently developed during the convalescent phase of dengue fever, with telogen effluvium identified as the most common type. Platelet count and hematocrit values were significantly lower in patients with dengue fever and alopecia than those without alopecia. These findings suggest that dengue fever–associated alopecia primarily presents as telogen effluvium, predominantly affects females, and may be associated with reduced platelet count and hematocrit as potential risk factors.