Epithelium, a type of epithelial cell tissue. Epithelial tissue is an important structure that lines or covers other tissues. It is composed of dense epithelial cells and a small amount of intercellular stroma. The structure is characterized by tightly bound cells and little intercellular stroma. It usually has protective, absorptive, secretory, and excretory functions. In the human urinary tract, the surfaces of the renal pelvis, ureter, bladder, and urethra are covered with epithelial cells. Epithelial cells in urine may all be shed in these organ ducts, and epithelial cells in the duct wall can be shed due to the impact of urine material or cellular aging, which makes epithelial cell adhesion weakened or insufficient. When the tissue is damaged it leads to increased epithelial shedding and the urinary routine will suggest elevated epithelium. The main cause of elevated squamous epithelium in the urinary routine is that inflammation of the urinary system, such as pyelonephritis, ureteritis, cystitis and urethritis, can cause elevated epithelium. The actual significance of this indicator for clinical diagnosis is not great. If the urinary routine suggests elevated epithelium, you can first drink more water, urinate more often, dilute the urine to observe a period of time and then recheck the urinary routine to see, if accompanied by elevated white blood cells in the urine is recommended to use antibiotic treatment for a period of time. In summary, the main reason for elevated epithelium in the urinary routine is inflammation of the urinary system, which is of little practical significance and need not be overly concerned.