Frequent urination, dysuria with fever, mostly due to urinary system infections, stones, tumors and other diseases. 1. Urinary system infection: the most common diseases belonging to the urinary system, acute cystitis, urethritis, pyelonephritis, etc., may cause urinary frequency and urgency of urination with fever symptoms. 2. Stones: kidney stones, ureteral stones and other stones in the urinary system can also cause urinary frequency and urgency of urination with fever, and there may also be lumbago, abdominal pain, nausea, vomiting, blood in the urine and other symptoms. 3. Tumor: various benign and malignant tumors of the urinary system, such as bladder cancer, prostate cancer, prostate tumor, urethral tumor, etc. can also lead to urinary frequency and urgency with fever. Frequent urination with fever, there may be other reasons, it is recommended to go to the hospital in time to check, clear cause and follow the doctor’s instructions for treatment.