I've used this herb before. Bearberry is prescribed by alternative medicine often for urinary problems like infections, urethritis and cystitis. I had cystitis last year and had a lot of chronic pain in my pelvic area despite being treated with antibiotics.
My brother's wife then took me to the ayurvedic doctor she visits sometimes and he prescribed bearberry tea for me. I did drink it for a couple of days and I'm not sure if it was the bearberry tea or the antibiotics taking effect but my pain disappeared. I stopped drinking it but I still have it in my cabinet.
I do think the bearberry tea helped because I had been taking antibiotics for two weeks before that and hadn't had any improvement.