Cystitis, or a bladder infection, causes inflammation and pain in the bladder. Women tend to have more bladder infections than men, though a man's chances of cystitis increase with age. Frequent, untreated cystitis can lead to kidney infections or kidney damage. The cause of bladder infections is E. coli bacteria. Treatments for cystitis range from home remedies to antibiotics for serious infections. Follow the links below to find WebMD's comprehensive coverage about how cystitis is contracted, how to treat it, and much more.