If you watch something that makes you feel physically sick what do you do to feel better?

I just watched this programme (yeah I’m English) on TV that made me feel really ill; Mainly with worry, not just for me but in general, and also because of the topic.

If you see something that made you feel physically sick, like blood or vomit or whatever, what can you do? If I see blood I always feel like I’m going to vomit or pass out.