VUR or Vesicoureteral reflux is the reverse flow of urine into the kidneys, from the urinary bladders through the tube that connects the kidneys to the bladder. Under normal circumstances the muscles of the bladder and the uterus, along with the pressure of urine prevents the backward flow of urine. Children are usually diagnosed with VUR, which often causes urinary tract infections. There are two types of VUR, primary VUR and secondary VUR. Primary VUR involves a condition in which children are born with defects in the valve. In case of secondary VUR, urinary tract malfunction occurs due to infections.