For many years I was very afraid of cockroaches. I don't know why they make me feel nauseous when I see them. As the years have passed the terror has faded to a lesser degree, but it still persists in the form of fear. I don't usually see them often, but at night I walk somewhere with a prepared container in hand, to expel a cockroach repellent, at the first appearance of any of them.
I don't always see them, but my fear of finding them is such that I always go prepared. I try to put them out of my mind but my fear has only diminished a little over the years.