will cause a person to get incredibly anxious just by the telephone ringing, really afraid of answering it even to talk to the people they care about most.
If actually with people, gets so anxious just to be touched, even by people they know and trust that they feel nauseous.

It's been over an hour since the last ring, and heart is still racing. Although this caller has been asked to stop. He won't listen that just needs left alone.