Malaria is a mosquito-borne infectious disease of humans and other animals caused by parasitic protozoans (a group of single-celled microorganisms) belonging to the Plasmodium type. The parasites travel to the liver where they mature and reproduce. Five species of Plasmodium can infect and be spread by humans. Most deaths are caused by P. falciparum because P. vivax, P. ovale, and P. malariae generally cause a milder form of malaria. The study has planned in Nalanda Medical College and Hospital. The 30 patients detected with malaria were enrolled in to the study. The patients showing positive malarial signs in pathological diagnosis without any other complications were enrolled into the study. Malaria continues to be common cause of morbidity and mortality in children. Globally 60% of clinical malarial cases and 80% of deaths occur in young children. Patients of vivax malaria should be monitored for the development of different complications as their early detection and treatment could be lifesaving. Further studies are needed to find out the reason behind this changing virulence.