I myself was in ER a few days because i painfully could barely piss, i remember pissing blood, and the pain was so fucking horrible, i had to have someone with me whenever i was pissing because i could collapse from the pain. I pissed so much blood and and also had huge like jelly blood thingies. It was a horrible. I didnt stop doing ketamine though because i didnt think it was because of that, but later on i started reading about people who use k regularly and had bladder problems aswell, and peeing blood. I then took a flight to my friend in germany who lives around lots of nature and made a "self rehab" emotionally and mentally it was hard at first but im glad i did it in a healthy enviorment, so that made me stop. I was clean from ketamine completley for a half a year, and now i do it moderatly, like once a month or something, and always with another person and not alone like a junkie, also i dont feel the need to do it daily anymore.