Cranberry Juice helps to kill the bacteria E Coli which is a cause of Urinary Tract Infections.
So Cranberry Juice can help with Urinary Tract infections but it's still advised to seek medical treatment from a doctor so that the Urinary Tract Infection doesn't get too bad and lead to other problems.
You can also help treat Urinary Tract Infections by staying hydrated and drink plenty of water and increase your intake of Vitamin C.