Dear Amira,
This is a very broad question and not one with a specific answer. More important than learning about problems and differences in other countries is developing cultural competence so that you are able to work across many cultures. I suggest you first look at Chapter 27 on "Cultural Competence in a Multicultural World" in the Toolbox, and the related Toolkit #9 "Enhancing Cultural Competence."
More specifically, the differences and problems depend on which country you are traveling from, and which country you go to. If you are concerned about problems or differences, I suggest that you research the country you are traveling to as much as possible to learn all about it, identify any potential differences or problems, and prepare for them. Most important is to find out about customs and beliefs that are different so that you can be sure not to offend people there (which can definitely cause problems). Also, if you have any limitations on the kind of food you eat, making sure the country you are visiting will accommodate them. Learning about things like clothing, religious beliefs, and gender roles can be very useful as well.
The Community Toolbox Advisor
