Fear of Vomit(ing)
Emetophobia refers to intense, irrational fear of vomit/vomiting
-including seeing/smelling vomit, seeing/hearing someone else vomit, feeling nauseated, etc.
Cognitive-behavioral therapy (cbt) -particularly the behavioral component involving exposure to the fear(s) (usually gradual exposure)- is considered the most effective treatment. A clinical psychologist who specializes in phobias can help.