What are the manifestations of chronic pyelonephritis?

The kidneys are a vital organ in the human body. Impaired kidney function can lead to numerous diseases, among which chronic pyelonephritis is one.

What Are the Clinical Manifestations of Chronic Pyelonephritis?

Pyelonephritis refers to inflammation affecting both the kidneys and the renal pelvis, most commonly caused by bacterial infection. Based on disease duration, it is classified as either acute or chronic pyelonephritis. Chronic pyelonephritis is generally defined as pyelonephritis persisting for six months or longer (sometimes defined as one year or more). Common symptoms include flank pain, urinary frequency, urgency, and dysuria—collectively termed urinary tract irritation symptoms. Urinalysis may reveal leukocytes or pus cells, while color Doppler ultrasound of the urinary system helps assess structural abnormalities of the kidneys and renal pelvis. Antibiotic therapy should be guided by culture and sensitivity testing results.

For mild cases of chronic pyelonephritis, symptomatic treatment suffices. Oral antibiotics such as amoxicillin or levofloxacin are commonly prescribed. Additionally, increasing fluid intake and maintaining frequent urination help alleviate symptoms and prevent recurrence.

In cases presenting with prominent systemic infection signs—such as fever and chills—and positive urine leukocyte tests, intravenous antibiotic therapy is indicated. Commonly used agents include cephalosporins, semi-synthetic penicillins, and quinolones. Combination antibiotic therapy with two agents may be employed, with a total treatment duration of six weeks. Alternatively, traditional Chinese medicine (TCM) may be considered—for example, herbs such as Lysimachia christinae (Jin Yin Cao), Kochia scoparia (Qu Mai), and Poria cocos (Fu Ling), all of which possess heat-clearing and diuretic properties that can help improve symptoms of pyelonephritis. We hope this information proves helpful to you.