Culture shock is caused by the stress of being in a new culture. It is a normal part of adjusting to new foods, customs, language, people and activities.
Symptoms of culture shock are:
Unwarranted criticism of the culture and people
Constant complaints about the climate
Utopian ideas concerning one's previous culture
Continuous concern about the purity of water and food
Fear of touching local people
Refusal to learn the language
Preoccupation about being robbed or cheated
Pressing desire to talk with people who "really make sense."
Preoccupation with returning home
Irritability
Overly concerned with health
Loneliness
Hopelessness
Distrust of hosts
Withdrawal of people
Lowered work performances