Jeremy experiences so much anxiety about taking the elevator that he climbs 10 flights of stairs to get to his office each workday. jeremy appears to suffer from

Jeremy appears to suffer from "specific phobia".

A specific phobia is any sort of nervousness issue that adds up to an unreasonable or silly dread identified with introduction to particular items or circumstances. Subsequently, the influenced individual has a tendency to stay away from contact with the articles or circumstances and, in extreme cases, any specify or portrayal of them.