Women with blood in the urine is a little painful, it is best to go to the hospital for examination to further clarify the possible causes: First, acute cystitis or urethritis can cause blood in the urine, accompanied by pain during urination or pain in the small abdomen, this condition is usually not accompanied by back pain or temperature rise. However, patients can have more obvious urinary frequency and urgency, and need to undergo urinalysis to clarify. Second, stones in the urinary system, such as ureteral stones, kidney stones or bladder stones, can cause blood in the urine. At the same time, it can be accompanied by pain in the area where the stone is located, such as lumbago or abdominal pain, often due to excessive friction of the mucosa of the stone, resulting in the breakdown of the mucosa and bleeding, thus causing blood in the urine, and further ultrasound examination of the urinary system is needed to confirm the diagnosis. Thirdly, if the patient is of advanced age, it should be considered that there may be tumors in the urinary tract, such as kidney tumors and bladder tumors that can cause blood in the urine. In the early stage, there may be no pain, but the tumor may increase in size to a certain extent and may be accompanied by pain, such as small abdominal pain or low back pain.