General application of dexamethasone in children can have the following therapeutic effects: firstly, it can play an anti-allergic effect, when allergic diseases occur, dexamethasone can be applied to play a good therapeutic effect, for example, after the occurrence of atopic dermatitis, allergic rhinitis, and even allergic asthma, the application of dexamethasone can play a good role in improving. Secondly, it can play the effect of immunosuppression, autoimmune diseases, the application of dexamethasone can also play a good role, such as the occurrence of immune thrombocytopenia. Dexamethasone also has adverse effects that must be noted, for example, dexamethasone can inhibit children’s immunity, resulting in recurrent infections, and dexamethasone can also cause growth retardation.