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It one year im using my iphone just yesterday I noticed my screen right side slightly come out also the left side ( more on right) I charge my phone with not original charger i search just found its battery issues is that correct? And if yes after I changing it will back inside?!
Your battery may or may not of swelled up, if it has swelled up, this will cause pressure on the screen causing it to pop out from the frame, you would need to replace the battery if it is swollen. After that you have two options really, either replace the screen, or use a reflow station or heat gun to heat up the parts that have popped out and reseat them, and use clamps or something to hold them down. :-)
