When you wipe your urine with faint blood, this condition is hematuria. There are especially many causes of hematuria, the most common of which is urological diseases. First of all, it is important to distinguish whether it is true hematuria or pseudohematuria, because some drugs and foods can also cause the color of urine to turn red, such as consuming large amounts of red heart dragon fruit or taking oral rifampin or phenytoin sodium. If hematuria is accompanied by frequent, urgent and painful urination, most of them are caused by acute cystitis, most often in young and middle-aged patients. Hematuria with puffiness in the eyelid area, face or body, and elevated blood pressure may be caused by acute nephritis or nephrotic syndrome. Hematuria accompanied by back pain or severe pain in the lower back and abdomen can be seen in ureteral calculi. Therefore, routine urine tests as well as urinary ultrasound must be done to clarify the specific cause of hematuria.