The elimination time of edema should be judged according to different causes, and the elimination time ranges from 1 week to several years. 1. Localized edema: such as mosquito bites, inflammation, allergies, etc. can cause localized edema, which can be treated symptomatically by taking medication, and the edema will usually subside within 1~2 weeks, such as anointing with anemone after mosquito bites, and eating cetirizine for allergies. 2. Generalized edema: during pregnancy, due to the increase of blood volume in the whole body, venous reflux is blocked, leg edema will occur, edema can be subsided after the birth, this is physiological edema. 3. Pathological edema: heart disease, kidney disease, liver disease can cause edema. Depending on the severity of the disease, edema may take a different time to subside. If the symptoms are mild and treated early, the edema may subside within 1~2 months; if the symptoms are severe, even after treatment, the edema will take a longer time to subside, which may be several months to several years. All of the above medications should be used under the guidance of a doctor. If you find edema, you should go to the hospital in time to see a doctor and get targeted treatment after clarifying the cause of the disease.