Generally, the causes of neonatal platelet increase mainly include the following: 1, neonatal dehydration and other causes, if the child dehydration and electrolyte disorders or children fever, will lead to blood concentration, after the blood concentration, the newborn will appear the relative increase in platelets. For this situation, children need to be given timely fluid, such as newborns can be supplemented with oral rehydration salts or intravenous fluid, the platelets of newborns will gradually decline; 2, newborns suffer from infections, if newborns suffer from toxic infections or bacterial infections, these infections will lead to temporary hyperplasia of children’s platelets, which will also cause platelets to rise, and after the infection of newborns is controlled, the platelet count will return to normal. The platelet count will return to normal.