Blood in the urine and pain in the urine in women with urethral infections is a more serious infection, and blood in the urine only occurs when the infection is severe. Mild infections usually only appear frequent urination, urinary urgency, and will not appear obvious pain and blood in the urine. Often due to infection caused by extensive mucosal congestion, edema, erosion and other reactions, which can cause local bleeding, blood mixed in the urine, can be manifested as a reddish color of urine. At the same time, because of the pain caused by the acute inflammatory reaction, urine contact with the inflammation of the surface of the mucous membrane, can produce pain aggravated performance. It is necessary to immediately go to the hospital for treatment, urine culture and drug sensitivity test, after diagnosis of the cause of the disease, it is recommended that the intravenous infusion of anti-infective treatment. At the same time, it is necessary to carry out relevant imaging tests, such as ultrasound and CT of the urinary system, to exclude other diseases that cause bleeding, such as bladder tumors, kidney tumors and other diseases.