The course of acute pyelonephritis varies from person to person, with most patients usually getting significant relief in about 1-2 weeks. Acute pyelonephritis is an upper urinary tract infection. Because of the short, wide and straight urethra in women, the disease is more common in women between the ages of 20 and 40. The typical clinical manifestations are fever, marked urinary tract irritation or hematuria. This disease should be treated with strict bed rest, and the symptoms are usually relieved significantly in about 7-10 days for those with good resistance. If the patient develops chills and fever, antimicrobial agents should be used intravenously and then switched to oral medication 3 days after the fever subsides. The indicator for discontinuation is sufficient time to use antibiotics and two consecutive negative urine cultures, so the overall medication course is about 2 weeks. Acute pyelonephritis has a good prognosis and can generally be completely cured without any sequelae, but the treatment period may be relatively long for specific types of pathogenic infections. Patients with fever and significant systemic symptoms need to be given a liquid or semi-liquid diet and then changed to a normal diet when the symptoms disappear. Chinese medicines such as Chai Ling Tang are advantageous in the treatment of acute pyelonephritis.