[HTC EVO 3D] Kite-G:
Hi, although I've been reading around the forums for like a year now, this is my first post.

----------Story:

Recently (about a month ago) I started to notice a dark smudge on my phone's display. Its very light and hard to see, but when I notice it (often) its very bothersome. Its like half an inch from the right, right in the middle. I googled about it for a while, and apparently it has to do with the amount of pressure applied to the glass. This was hard to believe to me, because I take care of my phone like if it was a baby.

Anyways, being bummed about it. I move on living. And just in my daily phone use, i decide to take off the battery cover for a reason I can't remember, I did this with the display on, and I noticed that while I was lifting the battery cover, the smudge area of the display started to glow in colors, like when you apply too much pressure on the glass. And this got me curious. I started pressing different parts of the phone, and noticed that the smudge area goes crazy when i press right under the capacitive buttons. And the plastic frame on said area. After this I did bought the story about the display being damaged by too much pressure. Anyways, everything changed just a few minutes ago.

I was trying to free up the most RAM possible, so, looking around on the settings, i got into developer options and accidentally got curious and messed with something that froze the phone. I decide to take out the battery, and I find myself again with the battery sorta.. Sticking out a little, like when you lift the battery to take it off but not completely. This is something I had noticed months ago, maybe last April or May. Well since it really bothered me because the battery just wouldnt go all the way in, i decide to inspect it. And note that i have done that before, the first time i tought that it was normal, the second time i tought that it was the shape of the phone. But today it hit me. Thats not normal! The battery is bigger. Like, right in the middle, the battery has a litte bump on both sides, like when you bake a cake and it grows, well, a bump just like that. But its hard to seem really hard to see. But somehow I could feel it in the hand, and I decided to put it on a flat surface and it is indeed true. The 4 corners don't touch the surface at the same time, not even pushing it down. And I remember it used to back when I bought the phone a year ago.

And that's not all, the worse part is, that I realized that the bump of the battery aligns perfectly with the smudge on the display. So it must be it!! The battery applied pressure from underneath, causing the display to touch the glass. And as i checked around the phone, turns out that the glass is slighly getting detached from the lower area (battery area).

Maybe it wasn't my fault, but I feel so guilty for not noticing earlier. I'm really worried, as I have very poor battery life, and I fear the display getting damaged even further. Oh, and also. I noticed that all the issues I saw on Google about the smudge on the display, are in the middle, half an inch from the bottom just like mine. What if its the same battery problem?

-------- question:

Is that really whats going on? And what should i do to resolve this problem?

I was really paranoic the moment I realized that the battery was messing up the display. So I rushed here looking for help. Thanks in advance.

My device is an HTC EVO 3D, (VM), Running CM 10.1 WFTN, and the battery is stock.