Dexamethasone has anti-inflammatory, anti-allergic and anti-metabolic effects. The anti-inflammatory and anti-toxic effects of dexamethasone are relatively strong, while the side effects of water and sodium retention are relatively small, so dexamethasone is widely used in clinical treatment of diseases. The infusion dose of dexamethasone generally does not exceed 20mg per day, and the intramuscular injection dose is preferably 8mg per day; dexamethasone can also be used for joint cavity injection treatment, not more than 6mg at a time; when dexamethasone is used as pain point treatment, the dose of each pain point is 0.02mg, and the total measurement does not exceed 2.5mg, which can be injected once a week; the dosage of dexamethasone tablets is generally 0.75-3mg per time, 2-4 times a day. 3mg, 2-4 times a day. Dexamethasone use should be strictly controlled dose, too large dose of dexamethasone can cause peptic ulcer, venous thrombosis, non-healing wounds and other side effects.