Urine bloodless wiping with light blood suggests that there may be urethral diseases, such as urethral polyps, condyloma acuminatum, urinary stones, urinary tract tumors. 1. Urethral polyps: can be broken and bleeding when wiping after urination, urine is often normal, can be manifested as a painful sensation in the urethra. It is important to seek timely medical examination to check whether there is ulceration and other manifestations. 2. Acromegaly: mainly through sexual transmission, a history of unclean sex will lead to infection with human papilloma virus, will appear in the patient’s evil urethra, perineum, such as sarcoma-like changes. The same easy to bleed when wiping, because of urination did not rupture so the urine is normal. 3. Urolithiasis: it can be divided into upper urinary tract stones and lower urinary tract stones, except that upper urinary tract stones are usually manifested as microscopic hematuria, which can be accompanied by renal tenderness and other manifestations, and lower urinary tract stones are often manifested as interruption of micturition, pain in urination, etc., which can be accompanied by hematuria or infection. 4. Urological tumors: kidney cancer is common, which mainly manifests as intermittent painless hematuria, abdominal mass and lumbago. If there is no blood in urine and there is light blood when wiping, and if the blood continues to be unrelieved, you should consult a doctor in time to receive regular examination and treatment.