Bladder infections can cause pain and burning upon urination, pelvic pain, an increase or decrease in urinary output, and sometimes blood in the urine. Treating bladder infections typically includes the administration of oral antibiotics and drinking plenty of water. Cranberry juice may also help alleviate symptoms of bladder infections as may taking an over-the-counter anti-inflammatory medication. Systemic symptoms of bladder infections include fever, chills, nausea and muscle pain. Although antibiotics are effective in treating symptoms of bladder infection, they can cause side effects such as nausea and diarrhea. The entire course of antibiotics must be completed to make sure that the bladder infection has resolved.