Dear aspirant, as BNYS is bachelor of naturapathy and yogic sciences , so study is related to that only and to treat someone through naturapathy and yogic science there is no such surgery done.For more details you may follow the link below:
https://www.careers360.com/university/swami-vivekananda-yoga-anusandhana-samsthana-bangalore/bnys-course
Hope it helps.
All the best:)
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