Side effects of dexamethasone for children include lowering immunity, causing mental restlessness, and large doses can lead to problems such as hirsutism, full moon face, and peptic ulcers. Dexamethasone has anti-inflammatory, anti-allergic and anti-shock effects and has a wide range of clinical applications, but its use needs to be used according to the instructions, and the major authoritative guides do not recommend dexamethasone solely for its antipyretic effects in children. Dexamethasone use may lead to mental agitation and emotional problems such as agitation and delirium. In addition, prolonged use in high doses can lead to the development of hirsutism, full moon face, peptic ulcers and other manifestations in babies. Dexamethasone also has side effects such as suppression of immune function, irritation of the digestive tract and other adverse effects. Dexamethasone application needs to be applied under the guidance of a professional doctor to avoid private use of the drug causing adverse reactions and complications, etc.