May one enter the bathroom with his child in order to help the child?
Yes.<a href="#_ftn1" name="_ftnref1">[1]</a>
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<a href="#_ftnref1" name="_ftn1">[1]</a> This does not pose a modesty prohibition as doing so is necessary. This is similar to the allowance to be undressed in a bathhouse due to lack of choice.

Shulchan Aruch HaRav | May one enter the bathroom with his child in order to help the child?

May one enter the bathroom with his child in order to help the child? Yes.[1] [1] This does not pose a modesty prohibition as doing so is necessary. This is similar to the allowance to be undressed in a bathhouse due to lack of choice.