The word, phobia, is a variation of the word, fear, except that is is defined as being unreasonable.
The word, phobia, is a variation of the word, fear, except that it is defined as being unreasonable, whereas fear that is generalized is one that is realistically and factually obvious. Fear, by itself, might be momentary and might be overcome under normal circumstances, in an environment conducive to relaxation and reasoning. Phobia is usually an imagined sense of fear that is not considered life-threatening. A person, constantly obsessed with a particular phobia may lapse into depression, particularly when the problem causes him or her to become isolated from friends and family.
Any kind of phobia that is imagined and unreasonable might even affect a person biologically. There are instances when some unreasonable phobias that could not be overcome have resulted in mental breakdown; yet, there are those that succeed in conquering their phobias at some point in life. when it is not too late to shake off their phobias and come to terms with reality.
There are those that experience extreme fear when they come across certain objects that are harmless and pose no danger, unrelated to things that are intrinsically hazardous, such as chemicals known to cause diseases, such as cancer.
There are people who have a phobia of being alone, of the darkness, lightning and thunder. A common phobia that seem to affect many people is claustrophobia, which is the fear of riding in an elevator, or using a telephone booth. There are other phobias, such as fear of heights, crowds, water, tunnels, bridges, animals, all of which could be psychologically unsettling.
It is not unusual for children to develop certain phobias, some of whom are fortunate enough to overcome the problem, as they grow older, depending on how their parents and teachers deal with the problem, the kind of environment that should be conducive to their way of thinking, as well as their exposure to society and education.