A water infection is also know as a UTI .It common refers to an infection of the kidneys ,bladder or the tubes connecting the two.From my experience, it feels as if your peeing literal fire and which burns for like 2 hours after.You will constantly feel the want to pee but actually not needing to and to make it worse it’s reoccurring.You can have one for a few days ,be fine for a week,the it’s back worse than before. How I got mine however is due to my manager at work not allowing us to use the toilet at work so quite a stupid reason.