When the body suddenly appears edema may be hypoproteinemia, cardiac insufficiency and liver lesions. 1. Hypoproteinemia: Hypoproteinemia is more common in life. Patients who suffer from malnutrition, poor nutrition, and hypoproteinemia caused by chronic renal disease will cause a decrease in plasma colloid osmotic pressure, which will then lead to the continuous stagnation of tissue fluids in the tissue interstitial space, and edema of the body will be formed. 2. Cardiac insufficiency: cardiac insufficiency or even heart failure can also lead to edema, which is caused by increased intracapillary pressure due to sodium retention and venous stasis. 3. Liver lesions: many kinds of chronic hepatitis or alcoholic cirrhosis of the liver dysfunction, plasma albumin protein synthesis decreased ascites, and even double lower limbs, eyelid swelling. These are only some of the common causes. When the body suddenly appears edema, you should consult a doctor in time, and follow the doctor’s instructions for standardized treatment after clarifying the cause of the disease.