I Want to find this Click here to see the photo

How should i find the child value which i have marked in the image.
I Want to find this Click here to see the photo

How should i find the child value which i have marked in the image.
that's a user id,you can usegetUid() to get that but as said in earlier comment share a snippet of your code for clarification as your question is quite ambigous.
To get a child FirebaseDatbase.getInstance().getReference("Patient").child(Uid)