Urea 9.3 mmol/L is not particularly serious. Increased urea is generally associated with kidney disease, urinary tract stones, large burns and other factors, in addition to a large amount of meat can also lead to elevated urea. It is recommended that the patient go to the hospital in time to improve the relevant examination to clarify the cause of the disease. The normal value of urea in adults is 3.2~7.1mmol/L, and the normal value of urea in children is 1.8~6.5mmol/L. Since the value of elevated urea is not particularly high, it is not particularly serious. But it may represent an abnormal condition. 1. Kidney diseases: such as acute renal failure, chronic nephritis, renal arteriosclerosis, chronic pyelonephritis, renal tuberculosis and other diseases. Due to renal insufficiency, resulting in reduced glomerular filtration rate, there will be increased urea. 2. Urinary tract stones: Urinary tract stones can cause frequent urination, less urination, painful urination and so on. Stones block the urethra, resulting in decreased urine output. It will lead to the condition of increased urea. 3. Large burns: usually the area of the scald is larger than the area of the scald, causing a severe infection caused by the elevation of urea. It can also be accompanied by abnormalities in blood creatinine. In addition, physiological elevation is seen in the high protein diet, generally no special treatment, light diet, can return to normal. It is recommended that patients with urea abnormalities go to a regular hospital in time, complete the relevant examinations, clarify the cause of the disease, and follow the doctor’s instructions for standardized treatment.