How to fix a Galaxy S6 front screen that's pulling away from frame?

[Hiddenroses]

My daughter's S6 front screen yesterday started to be slightly raised away from the phone frame. The separation is on the long edge, same side as the volume buttons if that makes a difference. There has been no damage done to the phone, nor any trauma [like getting wet], and no battery or overheating issues. Thank you in advance for any help.