This is the first paragraph of the section on Culture Shock offered by UKCISA, UK Council for International Student Affairs.
It goes on to explain the areas of life culture shock has an effect on:
Rules of behaviour
Read everything on culture shock in the UKCISA webpage, which includes its different stages, the effects and some advice to help you overcome culture shock.
They also let us know about What's up with culture?, a similar site for those students who are going to move to the States.