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Mental health issues can affect a student who is studying in other countries in different ways. For instance, nostalgia. Many people fail and cannot stay in other country for much time due to nostalgia This means that the student misses his country, his home state, the culture, language, traditions, and food of his former country. The student misses his friends and his family.
That nostalgia many times turns into sadness and then is when the student wants to immediately come back home.
If the student has a mental health issue such as any propensity to schizophrenia loneliness or another issue, the problem worsens.