Total protein is mainly composed of albumin and globulin, and its normal value range is 60-80g/L. However, whether the total protein is normal or not needs to be decided according to the normal value range of the laboratory test issued by different hospitals. Normal total protein does not mean that there is no clinical disease, it is also necessary to combine the symptoms, signs and related auxiliary examination to make a comprehensive judgment. Lower total protein is mainly seen in malignant tumors, severe tuberculosis, hyperthyroidism, nephrotic syndrome, ulcerative colitis, cirrhosis and other chronic wasting diseases, which suggests that there is severe malnutrition. Elevated total protein is mainly seen in blood concentration, such as frequent vomiting, severe diarrhea and high fever. Some diseases can also cause elevated total protein, such as systemic lupus erythematosus and macroglobulinemia. Total protein is now a liver function test, which also needs to be performed on an empty stomach.