Dexamethasone belongs to the hormone class of drugs. The use of hormone class of drugs needs to be decided according to the type of disease and individual condition, and cannot be generalized. Dexamethasone is mainly used for the treatment of allergic diseases and autoimmune diseases, such as connective tissue diseases, rheumatoid joints, lupus erythematosus, and severe dermatitis. Generally speaking, dexamethasone has a long half-life, and if used for a long time it will accumulate in the body and cause damage to the cardiovascular system, endocrine system, respiratory system and the nervous system, causing patients to develop hypertension, diabetes, weight gain, Cushing’s syndrome face and physique, osteoporosis, and muscle weakness. And once patients start to take dexamethasone can not arbitrarily stop, miss or change the dose of the drug without permission, otherwise it will affect the efficacy and even aggravate the development of the disease. Therefore, when using dexamethasone, patients must consult their doctors and have them administer the drug reasonably according to their conditions. Note that any discomfort should be communicated to the treating physician in a timely manner while taking the medication.