Turns out that fear is pretty normal—experts say being scared of the dark is actually a fairly common thing among adults. According to clinical psychologist John Mayer, Ph.D., author of Family Fit. Adult Fears are about the things mature, well-adjusted adults generally are concerned about, as opposed to supernatural, petty or far-fetched fears: the safety of their children, the safety of their neighborhood, the fidelity of their spouse, the loyalty of their friends and coworkers, the health of themselves and their family, being able to pay their bills, etc.
Phobia—when an individual is fearful of certain things, places or events—is the most typical type of anxiety. Among adults, anxiety is the most common mental health problem for women, and the second most common for men, after substance abuse. Older adults with anxiety disorders often go untreated for a number of reasons.