What do i do for a bad kidney and bladder infection?

See your doctor!: If you have a severe bladder infection, the most appropriate treatment is to take antibiotics. Your doctor can help choice both the most appropriate antibiotic and for how long to take it. A kidney infection can be severe and even require time in the hospital so it is important not to delay treatment. Your doctor can also test the urine to confirm which bacteria is infecting and how to treat it.