Increased urea is mainly seen in acute and chronic renal diseases, such as renal failure, glomerulonephritis, interstitial nephritis, renal tumors, obstructive nephropathy, polycystic kidneys and so on, but severe dehydration, shock, cardiac insufficiency, large amount of ascites, extensive burns, high fever, hypothyroidism, acute infectious diseases, severe trauma can also be caused. Therefore, if you find increased urea, it is recommended to consult the hospital immediately, improve the urine routine, blood biochemistry, blood routine, coagulation system, urinary tract ultrasound and other related examinations, in order to clearly diagnose the disease, and then give active and reasonable treatment.