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Painful urination is another symptom that should not automatically be labeled as chronic kidney disease. Burning or pain while urinating is commonly associated with urinary tract problems such as infection. Kidney infections can also produce urinary symptoms, fever and pain around the side or back. A clinician may use urine testing and other examinations to determine the cause. Treating every urinary symptom as evidence of kidney failure can create unnecessary fear and may distract from other conditions that require different treatment.
Back or flank pain deserves similar caution. The kidneys are located toward the back of the upper abdomen, but chronic kidney disease itself often does not produce the kind of persistent back pain sometimes claimed in online symptom lists. Kidney stones, kidney infections and certain other kidney conditions can cause significant pain. Musculoskeletal problems are also extremely common causes of back discomfort. Pain therefore needs to be evaluated according to its location, severity and accompanying symptoms rather than assumed to represent declining kidney filtration.
Pain associated with kidney stones can be severe and may radiate from the side or back toward the lower abdomen or groin. A kidney infection can cause pain together with fever, chills and urinary symptoms. These are different medical problems from the gradual loss of kidney function seen in many cases of chronic kidney disease. Distinguishing among them matters because treatment is different. Persistent or severe pain, particularly with fever, vomiting or urinary changes, warrants appropriate medical evaluation.
Puffiness around the eyes can sometimes be associated with kidney problems, especially when protein is leaking into the urine. Kidney filters normally help keep important proteins such as albumin in the bloodstream. When those filters become damaged, increased amounts of albumin may pass into the urine. Changes in fluid distribution can then contribute to swelling around the eyes. Some people notice this most clearly in the morning, although the pattern is not universal.