Phobias
A phobia is a strong irrational fear of anything, and is a very common problem. We all feel fear occasionally, but in a phobia this fear is out of all proportion to the danger.
Agoraphobia: fear of open spaces
From a fear of stepping outside to a need to stay in one familiar place, such as your home.
Claustrophobia: fear of confined spaces
This well-known terror tends to strike at anyone who has had an early experience of feeling trapped in a small or closed-off space.