Dexamethasone is commonly used as tablets and injections, etc. Long-term use of dexamethasone may lead to water metabolism disorder, Cushing’s syndrome and osteoporosis in children. 1. Water metabolism disorder: long-term use of dexamethasone will cause electrolyte metabolism disorder, resulting in water metabolism disorder, which may cause swelling and other symptoms in children. 2. Cushing’s syndrome: Dexamethasone has the effect of suppressing immunity, during the application of dexamethasone will cause a decline in immunity, which will lead to recurrent infections, and may lead to symptoms such as full moon face and buffalo back. 3. Osteoporosis: In addition, dexamethasone also inhibits the production of growth hormone, thus affecting the growth and development of children, which may cause calcium deficiency and osteoporosis symptoms. Therefore, dexamethasone must be used carefully under the guidance of a professional doctor, do not blindly use your own medicine, so as not to cause adverse consequences.