Urea nitrogen 9.7mg/dL is not serious, the normal range of urea nitrogen is 9 to 20mg/dL, at this time the urea nitrogen is normal. Urea nitrogen, if high, will also have certain side effects on the human body, generally suggests that there is an abnormality of kidney function, but this result is sometimes affected by dietary factors, in addition to the negative nitrogen balance, gastrointestinal bleeding and so on may also cause elevated levels of urea nitrogen, and therefore can not be diagnosed with kidney disease. So usually pay attention to the diet, pay attention to dietary diversity, avoid large intake of high protein food, this time may lead to elevated urea nitrogen. There are many reasons for low urea nitrogen, urea nitrogen is the product of protein metabolism, when protein intake is insufficient, low urea nitrogen will occur. If the liver metabolism function is abnormal, urea nitrogen may also be low. If you find abnormal urea nitrogen, it is recommended that you consult a regular hospital to find out the cause and follow the doctor’s instructions for treatment.