A sudden wave of sickness overpowered him.

I feel like throwing up.

Halfway through the lecture, she began to feel sick.

The dirty plates in the restaurant disgusted us.

I feel sort of dizzy and I feel like throwing up.

Just seeing a picture of food is enough and I start to feel sick.

Are you still feeling sick?

Have you experienced nausea recently?

Tom was very squeamish and would pass out at the sight of blood.

Tom is squeamish at the sight of blood.