Vitamin C Injection can treat scurvy; various acute and chronic infectious diseases and the adjuvant treatment of purpura; the treatment of chronic iron poisoning; the treatment of idiopathic methemoglobinemia. Vitamin C can treat scurvy, but also can treat a variety of acute and chronic infectious diseases and the adjuvant treatment of purpura. Chronic iron poisoning treatment, vitamin C can promote the chelation of iron by desferrioxamine, so that iron discharge accelerated. Vitamin C can also be used in the treatment of idiopathic methemoglobinemia. In addition to the above diseases, there are infections, fever trauma, burn surgery patients vitamin C needs to increase the appropriate supplementation. Vitamin C can be supplemented appropriately. During the use of vitamin C if rapid injection may be dizziness, fainting, long-term use is prone to cause urate or oxalate stones. Contraindications are not clear. Drug use is under medical supervision.