The symptoms of urinary tract infection are mainly caused by bacterial attack on the mucosal epithelial cells of the urethra, which mainly manifest as urinary tract irritation symptoms such as frequent, urgent and painful urination. Patients with severe infection may be accompanied by peripheral symptoms, such as high fever, chills, nausea, vomiting, dizziness and headache. Generally speaking, normal people urinate 4-5 times a day, and a sudden increase in the number of urination and low urine volume is often a cause for alarm as to whether it is a case of urinary tract infection. The chances of urinary tract infections are higher in women than in men because the female urethra is shorter and more prone to bacterial infections, and the proximity of the vagina and urethra in women, without attention to cleanliness, can give bacteria the opportunity to take advantage of it. Urinary tract infections can be divided into upper urinary tract infections and lower urinary tract infections. Upper urinary tract infections include pyelonephritis and pus accumulation in the kidney, which can manifest as fever, back pain, frequent urination, urgency, painful urination and hematuria. Lower urinary tract infections include cystitis and urethritis, which can manifest as frequent urination, urgency, painful urination, burning sensation of urination, etc. There is often discharge from the urethra. If the above symptoms appear, it is still recommended to go to the urology department of a public hospital for a formal examination in a timely manner, to do urine and secretion culture if necessary, and to choose sensitive antibiotics for treatment to ensure that it can be cured. Do not use random medication and delay treatment.