Acute pyelonephritis is an infection of the urinary system, and patients often have symptoms of back pain. The primary treatment for lumbago is infection control, and antibiotics for gram-negative bacilli are often used clinically, including penicillins, cephalosporins, and quinolones. Secondly, for patients with significant back pain, pain medication can be used after excluding other diseases that cause back pain, commonly used pain medications are: celecoxib, diclofenac sodium, etc. Patients with acute pyelonephritis may also have lower abdominal pain, chills and fever, nausea and vomiting, and bladder irritation symptoms such as frequent, urgent and painful urination, in addition to low back pain.