How do you know when you are retaining water

I only urinate once or twice a day normally. is this normal?

retaining water will make your body swell. my mom retains a TON of water to where her shins/calfs will swell up and if you push your finger on them, you'll leave a finger indention in her leg! now that's really bad! urinating once or twice a day really depends on how many fluids you're taking in. if you're not taking in many, then don't expect to urinate a lot.