There are three main reasons for the red color of urine: first, it may be due to urinary tract infection, such as severe cystitis, there will be frequent, urgent, painful urination, while the color of urine is pink or bright red; second, due to urinary stones such as kidney stones or ureteral stones, stones and mucous membrane friction, so it will lead to red cells into the urine, so the color of urine is red; third, mainly due to Malignant tumors of the urinary tract, especially malignant tumors of the bladder, can cause painless meatus hematuria. The above three aspects are the main causes of red urine color, so it is important to go to the urology department for timely consultation. If it is found to be caused by a malignant tumor of the urinary tract, surgery must be performed in a timely manner, and the earlier it is, the better the treatment results can be. If it is caused by an infection, then oral antibiotic treatment is required.