Are Kidney Infections Hard To Diagnos How To Tell When You Have A Kidney Infection?

How to tell when you have a kidney infection? - are kidney infections hard to diagnos

The lower back is painful and difficult for me to go. It feels like a muscle, or that I slept badly. It is like thinking that the pain is deep inside. I had a kidney infection before, but after a urinary tract infection, so I had other symptoms.

How can you tell if you have a kidney infection and what are the symptoms? It feels exactly how he felt before, but UTI. Is it common for kidney infection, without a first UTI?