My mother was emetophobic, although this wasn't something anyone realized until later on in life. I picked up her distress relating to vomit. She would tell me not to eat certain things or I'd get sick. If I ate too late at night, she would threaten me that I was going to get sick. (Yes, she was an abusive bitch as well.) So I became afraid to eat certain things, or I thought that if I ate food too late a night, I would throw up. Doing any of these things gave me great anxiety. She didn't let me do certain things, like let me go on field trips because "something might happen to me" and although she never really specified what it was, I think my mind drew its own conclusions. She gave this fear to my sister as well, but my sister managed to get over it in her 20s.