A bladder infection is also sometimes called a ‘urinary tract infection (UTI)’ or ‘bacterial cystitis’.
A UTI is an infection inside the bladder caused by bacteria, it’s painful and causes problems peeing. If a UTI is left for too long serious illness can develop.
Cats don’t often develop a UTI for no reason – it’s usually because something has enabled it to develop (for example a bladder stone).
It is important to contact your vet as soon as you notice any symptoms of cystitis.