I'm a Traditional Chinese Medicine acupuncturist. I have always had good results treating this condition, often with immediate effects. The pain is caused by 'heat' in the bladder, which may come from various sources. The acupuncture clears the heat (usually immediately) and corrects the underlying cause, which may take several sessions, depending on the health of each patient. Good luck. here's my website, which may provide any other helpful info:
www.curepoint.co.uk
fletcher
Curepoint, acupuncture in Bristol