Iphone 5s getting warm/hot with minimal usage. Is this normal?

I have had an iphone 5s for a year now. I recently got its screen replaced by apple because it stopped working. Ever since i got the screen replaced, i have noticed that even with browsing safari on Wi-Fi and LTE, it has been getting very warm, enough for me to worry about. Even after refreshing a page about 6 times, the phone heats up. It never becomes scorching hot, and its cool when no apps are running, but whenever i browse the internet, it gets fairly warm, even on Wi-Fi. Does your iphone 5s do this? If this is not normal, how do i fix this?

This video will tell you what you need to know

It should get warm when you use it.

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