Edema can be caused by many reasons, such as physiological factors like drinking too much water, or pathological factors like trauma, infection, kidney disease, etc. It is necessary to choose the method to reduce the swelling according to different causes. The common clinical methods to reduce edema include ice packs, medication, and so on. 1. Physiological factors: Drinking too much water within a short period of time or eating food containing more sodium may cause edema. You can massage, ice and other physical methods to reduce swelling. 2. Pathological factors (1) Trauma: Edema can be caused by external impact on the body or sprain during exercise. Early ice packs in the early stage of trauma can shrink blood vessels and limit the scope of edema, and hot packs after 48 hours can accelerate blood circulation and reduce edema. (2) Infection: edema caused by infection is usually red and swollen, accompanied by pain, elevated skin temperature and other manifestations, this kind of edema requires the use of cefazolin, penicillin and other drugs for anti-infection treatment. (3) kidney disease: nephrotic syndrome, nephritis and other diseases will affect the excretory function of the kidneys, resulting in edema. Clinical generally use hydrochlorothiazide, furosemide, spironolactone and other diuretics to relieve edema in patients. Patients with more serious kidney disease need to excrete excess water and toxins in the body through dialysis to eliminate edema. Edema can also be seen in right heart failure, hypoproteinemia and other diseases. If physiological factors are excluded and edema persists, it is recommended to go to the hospital in time and follow the doctor’s instructions after clarifying the cause of the disease, so as to avoid delaying the condition.