Foul Smell

Honestly, this began months ago. It really bothers me, it’s not always like this but sometimes it is and it’s really annoying. Okay, so idk why but whenever I pee, my pee smells really foul. I don’t know how to explain it, but it’s really gross and I don’t know how to make it go away. It’s not every time, but it is a good amount of the time that it smells really weird. Can someone tell me what to do to make it go away?