When my old iPhone 5 battery started expanding And that too after 2 years of heavy use 

And my screen started bulging outwards  due to that 

Well. I had no other option to get it replaced and move on 

But yeah it’s not because of over use but my model no. Was faulty with This same problem 

What a shame on apple 

And some how I never checked for its faulty thing as I too much trusted the brand 

So you all better be careful and keep checking apple forum for such incident 

Because after warranty over regardless your phone been so expensive you will not be able to do anything and they will ask you to buy an old phone at almost cost of new iPhone 

lol this is business at its worst effect on consumer bitches