If you’ve never had a UTI – congratulations. But if you’re constantly picking them up (or curious what they are), read our need-to-know guide Urinary tract infections affect the urinary tract (not surprisingly). This is the whole system you use to urinate and includes the urethra – the tube that you pee out of – the bladder and the kidneys. When you have a UTI, it can feel like you’re peeing fire. Twenty-seven times a day… It’s not fun, and can lead to kidney infections if you don’t tackle a...