Bladder and kidney stones happen as a result of proteins, calcium, and/or urea concentrating in higher levels than normal in the blood and creating stones when filtered through the kidney, sometimes making it into the bladder. These can be very painful as they “pass” though the kidney into the ureters and lodge in the bladder or get passed out of the body through the urethra on urination. Larger stones can lodge in the kidney and require a doctor’s attention to be removed.