Related Questions

How long would the symptoms of kidney infection last after treatment has started?

Pyelonephritis. An infection of the kidney (pyelonephritis) results in severe back pain, high fever and nausea/vomiting. Unlike an infection only involving the bladder, the ascension of bacteria into the kidney is a dangerous event. Since the kidney is swollen, it may take a few weeks for your back pain to get better. If you are referring to a bladder infection, the urgency/frequency and pain improves in a week. Read more...