Hello Sir, I Am Suffering From Recurrent UTI From Last

Hello sir, I am suffering from recurrent UTI from last 3 years. At starting it was bacterial infection. But now it comes after 3-4 months with pus cells but not bacterial infection. When I will take nitrofuraton. I will recover in 2-3 days. Year later I visited urologist, after inserting camera into urethra, Doctor diagnosed congested urethra.