Urinalysis during pregnancy reveals elevated bacteria, indicating the presence of urinary tract infections. The probability of urinary tract infection in female patients is relatively high, mainly due to the shorter urethra of female patients, which is easy to cause bacterial infections. The more common causative organisms that cause urinary tract infections in females are Escherichia coli bacteria, which are caused by low immunity of the patient. When the patient’s immunity is low, the bacteria are infected to the mucous membrane of the bladder through the urethra, which can cause frequent urination, urgent urination, and other symptoms. If the disease progresses further, it will continue to infect the mucous membranes of the renal pelvis and ureter, causing pyelonephritis, resulting in chills, high fever and other systemic reactions. Urinary tract infection during pregnancy requires active anti-inflammatory treatment to cure the disease as soon as possible, usually using cephalosporin antibiotics for antibacterial treatment.