Ur answer lies within ur question.
Stressful and depression in life often cause such symptoms.
Ur brother needs immediate mental health support.
Family support , peer group support is very much helpful.
But professional support i think necessary in this stage.
Consult psychologist or me and take proper mental health management.
If medicine needed then we also advice that.
Next Steps
Dobnot worry , he will be alright but do not delay to consult a professional.
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