Seven or eight years ago, I paid a nurse on the phone on the internet to help me she suggested I take bromelain and quercetin as I had had three and a half years of bloody UTIs! The doctors were no help at all. They kept giving me antibiotics, which never worked. One time I saw about a half an inch of sand in the urine cup. The lab never caught it and it never got recorded! So it could have been kidney stones!
The pain was so severe, it would put my blood pressure up into the stroke range. This was three and a half years of this! Never got any help from any doctors ever! Oh, actually there was one doctor he was a GYN and he prescribed estrogen cream to put up in the vagina every few days a very small amount and that helped tremendously.
Also several nurses said off the record they thought it was Interstitial cystitis since cranberry juice, even unsweetened, would make it worse!
The bromelain and quercetin pills were the answer! They are both enzymes. The bromelain is in the pineapple and green apples and red onions go on my salad with Romaine lettuce and flax seeds and whatever else I want to pile on there with real olive oil from either Italy or Israel and that red vinegar.
Of course, drink plenty of water 20 oz of water first thing in the morning 20 oz before bed and I'm a hundred 25 lb. If you're heavier, drink more. Also, another key is hydration very important hydration means eating the right foods. The minerals you need come from the foods, the water just carries helps carry it around. Drink a cup of water every hour, and don't drink out of plastic bottles.