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The signs and symptoms of bladder infection are as follows: Discomfort during urination is considered to be the most obvious sign of a urinary bladder infection. The person may not just feel a burning sensation, but a sharp pain and peculiar discomfort are also reported to be experienced by patients while urinating.
When it affects the lower urinary tract it is known as a bladder infection (cystitis) and when it affects the upper urinary tract it is known as kidney infection (pyelonephritis). Symptoms from a lower urinary tract include pain with urination, frequent urination, and feeling the need to urinate despite having an empty bladder. Symptoms of a kidney infection include fever and flank pain usually in addition to the symptoms of a lower UTI. Rarely the urine may appear bloody.