Blood urea is high in two cases: First, blood urea is mildly elevated while creatinine is normal, for this part of the patients with a large number of recent meat has a close relationship, it is recommended that the patients vegetarian diet 3 days to recheck blood urea, can be reduced to normal, second, blood urea is high with creatinine is elevated, for this part of the patients is caused by renal insufficiency, such as hypertension, diabetes, chronic kidney disease can cause kidney involvement, resulting in blood Urea is elevated. For these patients, they should pay high attention to the systemic examination of nephrology and apply kidney-protecting drugs, such as urinary toxicity pellets and Bailing capsules, to remove the causes of elevated blood urea and actively control them to avoid continuous progressive elevation of blood urea.