They are formed in the bladder due to the ingress of bacteria, mucus, foreign bodies through the urethra or sand and kidney stones descending through the ureter. The favorable moment is o-ostatapaya urine in the bladder itself, as well as the joined infection. Most often these are phosphate, urate and oxalate stones of various sizes.
Patients report pain, frequent urination, pain at the end of urination, blood in the urine. X-ray examination and dystoscopy help in the diagnosis.
Treatment consists, as a rule, in crushing stones; less often, an autopsy of the bladder is used.