Interstitial cystitis is a urinary bladder disease of unknown cause characterised by urinary frequency , urgency, pressure and/or pain in the bladder and/or pelvis. Pain typically increases as the bladder fills and reduces after voiding. However some patients report pain with urination, often in the urethra. Patients may also experience nocturia, pelvic floor dysfunction and tension , pain with sexual intercourse, and discomfort and difficulty driving, travelling or working. Research...