Why are there white marks on my iPhone screen?

[AlexExpert]

I have recently noticed some white marks (or spots) showing up on my iPhone screen. It’s really distracting, and I’m trying to figure out if it’s a software setting I accidentally turned on or if my actual display hardware is damaged. Can anyone here help?

 

[Liam Foster]

White marks on an iPhone screen usually indicate hardware damage. It can be because of pressure damage to the display panel, trapped liquid, or a swollen battery pressing from the inside.