Kidney Inflammation: Is Pain Normal During Treatment? - Internal Medicine

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Kidney inflammation (pyelonephritis)


Hello Dr.
Chen, I was diagnosed with pyelonephritis on August 1st.
It has been six days, and I am still taking antibiotics, but I still experience slight pain in my left lower back at times.
Is this a normal occurrence?

Lai Xiaojie, 30~39 year old female. Ask Date: 2015/08/07

Dr. Chen Jianyu reply Internal Medicine


Yes, if there is no improvement, please return to the outpatient clinic for follow-up treatment.

Reply Date: 2015/08/07

More Info


When dealing with kidney inflammation, particularly pyelonephritis (kidney infection), it's not uncommon for patients to experience some discomfort or pain during the treatment process. Your situation, where you have been on antibiotics for six days and are still experiencing mild pain in your left lower back, can be understood in several ways.

Firstly, it's important to recognize that kidney inflammation can cause pain due to the swelling and irritation of the kidney tissues. As the antibiotics work to combat the infection, it may take some time for the inflammation to subside completely. Pain can persist even as the infection is being treated, especially if the inflammation is significant. This is because the healing process involves the reduction of swelling and irritation, which may not happen instantaneously.

Secondly, the pain you are experiencing could also be related to the muscles and tissues surrounding the kidneys. Sometimes, the discomfort in the lower back can be due to muscle strain or tension, particularly if you have been adjusting your posture or activity levels due to the pain. It's essential to differentiate between pain that is a result of the kidney infection and pain that might be due to musculoskeletal issues.

Moreover, while mild pain can be a normal part of the healing process, it is crucial to monitor the intensity and nature of the pain. If the pain worsens, becomes sharp, or is accompanied by other symptoms such as fever, chills, or changes in urination (like increased frequency, urgency, or blood in the urine), it may indicate that the infection is not responding to treatment or that there are complications, such as an abscess or obstruction.

In your case, since you are still experiencing some discomfort after six days of antibiotic treatment, it would be advisable to follow up with your healthcare provider. They may want to perform additional tests, such as imaging studies (like an ultrasound or CT scan), to ensure that there are no complications or underlying issues that need to be addressed.

In summary, while some pain can be expected during the treatment of kidney inflammation, persistent or worsening pain should not be ignored. It's essential to maintain open communication with your healthcare provider, who can guide you through the healing process and make any necessary adjustments to your treatment plan. Remember to stay hydrated, rest, and follow any additional recommendations from your doctor to support your recovery.

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