Urinary tract infection, or urinary sensation for short, is an inflammatory disease caused by various pathogenic microorganisms that grow and multiply in the urinary tract. It is mostly seen in women of childbearing age, the elderly, immunocompromised or those with urinary tract abnormalities. The main manifestations are frequent urination, urinary urgency, urinary pain, urinary discomfort, lower abdominal pain, etc. Some patients may have difficulty in urination, and urine is often cloudy and has a bad taste and odor, and some of them may have hematuria. Simple lower urinary tract infection, usually no systemic symptoms of infection, only a few patients can appear back pain, fever, but the body temperature often does not exceed 38 ℃. If the patient has prominent systemic manifestations, such as high fever, chills, body aches, nausea, vomiting, body temperature greater than 38 ℃, back pain is obvious, should consider the possibility of upper urinary tract infection. Most of the causative organisms of urinary tract infection are Escherichia coli.