Hypoproteinemia is a condition in which the albumin of the plasma is below the normal value. Each region and hospital may have different laboratory indicators, but generally the normal value of albumin is about 35-65 g/L. If it is lower than this range, it is called hypoproteinemia. There are many causes of hypoproteinemia: first, liver problems, patients with liver disease because the liver’s ability to synthesize albumin is reduced, so it can lead to hypoproteinemia; second, kidney disease, patients with kidney disease may appear urine protein, protein leaks from the urine out of the body will lead to a decrease in plasma albumin; third, patients with malnutrition. Patients with gastrointestinal disorders, absorption dysfunction or patients who are losing weight may cause hypoproteinemia; fourth, patients with infections, which can reduce albumin after consumption. Therefore, hypoproteinemia should be seen in the hospital to clarify the specific cause.