If I take off my Tallis to go to the bathroom, do I make another Bracha when I put it back on? 

 

No, unless you completely diverted your attention from putting it back on or if a few hours have passed.

Regarding Tefillin – see here:

If I take off my Tefillin to go to the bathroom, do I make another Bracha when I put it back on? 

 

Source:

Alter Rebbe’s Shulchan Aruch 8:23-25.

 

 

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