ANSWER:

You must insist he uses the right hand for drinking and eating as using left hand for this is prohibited in Islam.

There won’t be any medical complications due to this. All muslims who are lefty eat with their right hands without a problem! 

In Islam, eating and drinking with left hand is prohibited but if we force him/her to be right handed it causes troubles for the child medically (to my knowledge). How should we treat the child in this case?

Etiquette, Morals and Heart-Softeners, Halal/Haram Matters | September 30, 2020 7:58 am
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Death can come to us anytime , so our last words should be There is no God but Allah , So whenever we are free or we don’t have anything to speak, can we say la ilaha illallah and stay silent , so if death comes that time , our last words will be la ilaha illallah.