There are more causes of painless hematuria in men, such as inflammation of the urinary tract, stones, tumors, etc., which need to be combined with relevant examinations to make a clear judgment. Painless hematuria refers to hematuria that occurs without abdominal pain and other conditions, and can be divided into carnal hematuria and microscopic hematuria. If painless carnal hematuria appears and disappears the next day, consider that there may be transient urinary irritation, such as stones irritating the urinary organs, resulting in tissue damage and hematuria. If hematuria appears frequently, it is necessary to consider whether there is a urinary tract inflammation or urinary tract tumor, etc. It is recommended to visit the urology department of the hospital as early as possible to analyze and diagnose the lesion through urinary routine, urinary tract ultrasound, CT and other examination items. In addition, red urine may also appear if you consume foods containing more pigment such as red heart dragon fruit, but this is not hematuria and needs to be differentiated.