The joy and the feeling that there are no obstacles for happiness is usually only the first and one of the shortest stages through which one has to go through after moving to a new country.

As soon as the euphoria subsides, there are many problems - from household issues from the series "how to pay electricity?" And "where to repair the bike?" To the more pressing "how to find friends and not become an outcast?".

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At the end of the 20th century, scientists were particularly interested in the processes of adaptation of emigrants to new living conditions and cultural shock, since migration has become an ordinary part of life in almost every country. Several theories were developed that could describe the mechanism of adaptation to the new country and adaptation.

The most famous and most controversial theory was the U-curve of adaptation, presented by Kalervo Oberg in 1954, and later repeatedly studied and developed by other researchers.

The first stage of adaptation is tourist, the person feels euphoria from moving, "I'm here, I could, there are no barriers for me".

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At the second stage, the stage of gradual frustration, the problems slowly increase. The emigrant still has fresh memories of the old country and inevitably begins to compare and usually does not favor the new country.

In the process of adaptation, emigrants often face a sense of loss of the role - now everything has to start anew, from scratch, some people may feel inferior.