Macbook Pro 13" (Late 2011) Bottom Plate Bulging

Hello there,
I own a Macbook Pro 13" (Late 2011). I have had it for sometime now.
I noticed that the bottom plate (the piece of aluminum that can be removed) is slightly loose in the front. There is a slight retreat when I press down on it. This is not happening to my newer Late 2013 15" Macbook Pro.
I heard that this can be caused by a swelling battery?! My battery has around 350 cycles on it.
Should I be concerned? Is it necessary to take it to an Apple Store and have them take a look at it??
Thanks for your answers in advance.

That could be the case. It wouldn't hurt to have them evaluate it at an Apple Store as the appointment is free.

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Macbook Pro 13" (Late 2011) Bottom Plate Bulging

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