When anxieties and fears persist, problems can arise. As much as a parent hopes the child will grow out of it, sometimes the opposite occurs, and the cause of the anxiety looms larger and becomes more prevalent. The anxiety becomes a phobia, or a fear that's extreme, severe, and persistent.

A phobia can be very difficult to tolerate, both for kids and those around them, especially if the anxiety-producing stimulus (whatever is causing the anxiety) is hard to avoid (e.g., thunderstorms).

"Real" phobias are one of the top reasons children are referred to mental health professionals. But the good news is that unless a child's phobia hinders his or her everyday ability to function, the child sometimes won't need treatment by a professional because, in time, the phobia will be resolved.