Okay, here’s the I’m-being-a-good-friend part. If the swelling is sudden, painful, or only in one leg, that could be a blood clot. Go to the ER. No jokes.
If your face or tongue swells up, that’s an allergic emergency. Call 911. A pufferfish face is not cute in that context.
Otherwise, relax. Your body is just a weird, leaky, salty water balloon. And now you know why it puffs up sometimes. Isn’t biology kind of hilarious?
Stay hydrated. Keep moving. And for the love of all things, put your feet up once in a while.