Chosen Solution

Today I noticed a tiny spot at the bottom left of my iphone (see img). About 1h later a second expanding stain appeared, top left (see img).. I have a few questions:

  1. what could be the reason?
  2. any advice to stop it from expanding? Will opening the phone make things worse or may it help?
  3. is the only way to fix it an LCD replacement? If so, is this what I need to do? If not, what do I need to do? Thanks everybody!!

@athanasius that is a bad LCD. The only way to fix it is by replacing it iPhone 5s LCD and Digitizer Replacement No ideait’ll continue. No stopping it.