 There are bad, bad things out there. You start to swell. One leg starts to swell. Your body starts to swell. Your lips start to swell. Your tongue starts to swell. Whenever something is happening very quickly and acutely, all of a sudden your abdomen is in major pain. You have a fever that's spiking up higher than it ever has. And if you feel like you're going to die, you get to an ER.