He ate some chicken that wasn't fully cooked.
He has food poisoning.
His finger is bleeding.
He's cut himself.
He can't stop sneezing and coughing.
He has a cold.
She feels lightheaded and as if the world is spinning around her.
She feels dizzy.
She has high temperature and her whole body aches.
She has the flu (Amer.) / flu (Brit.).
It's so hot and stuffy today that he's lost consciousness.
He's fainted.
He spilled / spilt some hot oil from the skillet onto his hand.
He's burned / burnt his hand.
She's been walking in her new high heels all day long.
She has a blister on her foot now.
The girl was eating a doughnut and a piece went down the wrong pipe.
She's chocking.
She has unknowingly eaten some peanuts and now she has a rash and has difficulty breathing.
She's had an allergic reaction.
The test reads 160 over 120.
The person has high blood pressure.
She feels like she is going to vomit.
She feels sick.
It hurts when she talks or swallows .
She has a sore throat.
He's breathing, but his eyes are closed and he can't hear or feel anything.
He's unconscious.
The girl's been to the bathroom several times already.
She has diarrhea.
I have stumbled on a tree root and twisted my foot; now it's swollen.
I've sprained my ankle.