Pneumonia in children is classified as mild pneumonia or severe pneumonia depending on the severity of the symptoms. Whether a child with pneumonia must be treated with fluids depends on the severity of the pneumonia. If the pneumonia is only mild, it can be cured by oral medication and does not necessarily require an infusion. However, for severe pneumonia, fluids are necessary to cure the disease. If the child has only mild pneumonia, it can be treated in an outpatient clinic or at home, for example, by oral medication or nebulization, and can also be cured. However, in children with severe pneumonia, oral medication is not sufficient to cure the disease, so hospitalization is required for infusion. Because intravenous infusion allows the drug to enter the bloodstream directly, whereas oral drugs need to be absorbed and metabolized before they can enter the bloodstream, the effect of intravenous drug administration is faster and better than that of oral drugs, so infusion therapy is also more effective for children with severe pneumonia. However, intravenous infusions also pose a greater risk of causing infusion reactions, and the direct entry of intravenous drugs into the bloodstream increases the probability of allergic reactions to the drugs, and may also stimulate blood vessels to produce phlebitis. The need for infusions in children with pneumonia should be arranged by the clinician and should not be taken without permission, and medications should be taken in strict accordance with medical advice.