The sclerosis of superficial phlebitis usually disappears within a month or so, but this is not a generalization and depends on the severity of the condition and the effectiveness of the treatment. In most cases, the sclerosis of superficial phlebitis is due to the fact that the medication administered irritates the endothelial tissue of the vein, leading to phlebitis, which in turn causes an abnormal occlusion of the venous blood vessels, and then the sclerosis will appear. If the size of the sclerosis is small and the drug is well absorbed, the sclerosis will usually disappear within a month or so. However, if the nodule is large, the absorption of the drug is poor, the treatment effect is not good, and the recovery time will be extended. It is recommended to go to the hospital for examination and diagnosis in a timely manner, under the guidance of a professional physician, combined with their own physical condition to carry out targeted treatment, so as not to have an impact on the health of the body.