Culture shock.

Frustration, confusion, fear, apprehension, and even disorientation because of differences between a person's own culture and the culture in which he or she is currently working or living are termed culture shock. Expatriates often suffer from culture shock. A person who does not know how to behave in personal or business activities in another culture may feel (and actually be) left out of activities and discussions. The expatriate may be perceived as being uncaring about the concerns and values of others. [ABSTRACT FROM AUTHOR]