Hyper-reactive malarial splenomegaly (HMS) or Tropical splenomegaly syndrome(TSS), occurs in areas of high transmission of malaria. These children usually presents with gross splenomegaly and abdominal discomfort, while fever is not the usual manifestation in majority of them. It is a disease of young adults and rarely reported below 8 years of age. Here it is reported a three-year-old child who presented as pyrexia of unknown origin with hepatosplenomegaly, diagnosed as HMS.