My phone has ink leaking

2 nights ago nothing happened, I woke up yesterday morning and there was a small black mark at the middle of my screen on the left side

I was extremely confused as to why it was there, it’s not a black circle like what I see most people talking about

its been spreading up in small lines, when I woke up this morning is has gotten twice as big and is all these little lines in one area

What can I do about it and why is it getting so much worse, how can I stop it from spreading