Localized Hypertrichosis Following Vaccination in an Infant

Hypertrichosis is characterized by increased hair growth independent of androgen excess. There are various causes of acquired localized hypertrichosis including chronic irritation and inflammation. Localised hypertrichosis following pentavalent vaccine has not been described previously in Indian literature. We hereby report a case of a 4-month-old healthy infant presenting with focal circumscribed areas of hypertrichosis over anterolateral aspect of bilateral thighs at the site of vaccination.