Inflammation in the urine generally refers to the presence of red blood cells, white blood cells or pus cells in the urine examination, so it is not necessarily caused by inflammation, and the common causes are urinary tract infections, urinary stones, urinary tract tumors and other aspects. 1. Urinary tract infection: when suffering from urinary tract infection, such as common pyelonephritis, cystitis, etc., can cause white blood cells, red blood cells increase in urine, and in severe cases, pus cells can appear. Common symptoms include frequent urination, urinary urgency, urinary pain and other symptoms. 2. Urinary stones: common kidney stones, ureteral stones, bladder stones, etc. in the stone caused by damage to the mucous membrane of the urinary tract, can be examined in the urine appear red blood cells, white blood cells. Often accompanied by low back pain, abdominal pain, hematuria and other symptoms. 3. Urological tumors: when suffering from urinary tumors, such as kidney cancer, bladder cancer, etc., in which the infiltration damage of cancerous tissues to urinary epithelium can be detected by erythrocytes, red blood cells, etc. in urine examination. Common symptoms include back pain, painless hematuria and so on. When abnormalities are found in urine examination, it is necessary to go to the hospital in time to check the specific causes and treat them so as not to delay the condition.