I know a girl who has emetophobia and she had to go to counseling for it. I also have a friend who hates being sick so much that it makes her cry. Being sick is so unpleasant that you can see why anyone would want to avoid it, but unfortunately we obviously can't if we're ill! For any of us with phobias we can choose to avoid or face, it must be a nightmare to have a phobia of something you can literally not avoid. I'd imagine this makes sufferers very wary of what they eat, drinking too much, picking up germs etc.