When I press my iPad screen a bit to hard,there's a liquidy thingy coming from my position of the finger.IS IT NORMAL??

It isn't necessarily a certain number of time that you press it that it's going to do damage. It's more the fact that any time you start pressing that hard you can damage your LCD. There is no reason to really start pressing on the screen that hard. You are pushing the glass into the LCD itself and causing the liquid crystals to move around causing the mark like you are getting. There is no reason to push that hard, just don't do it.

All LCD screens do that if you press too hard. Don't press it so hard. You're putting too much pressure on the Liquid Crystal Display.

It could cause dead pixels. A dead pixel would be a pixel that no longer works so you'll see a black spot where the pixel is that doesn't work. It could look like a spec of dust on your screen that won't go away. It could also cause a stuck pixel which is essentially the same thing but instead of the pixel being black or "off", it could be stuck on another color and never change. I have seen this is many colors. Basically youll see a spot on the screen that could stay green forever, it won't be a big spot as a pixel is small, but that pixel would always be green.

If you press hard enough, you can cause a dark spot that stay on the screen. I did that with one of our monitors we were moving when rearranging the office. It started to fall over and I grabbed it from behind. Where my fingers clamped down on right side the screen (rather than the frame), you could see my fingertips as slight oval shadows on that side of the screen. It's called compression damage, or something like that. Over the course of about two to three years since that happened, the fingerprints have faded away. Which is nice, because neither I or the manufacturer thought they would.

Anyway, pressing hard does nothing extra as far as getting the software to respond. A gentle touch is all that should ever be needed.

Please read the responses above, especially the one from ZintainUSA. It explains what a damaged pixel is. And as Kurt says, stop pushing so hard on the display, it is not required, and will cause damage.

When you remove your finger, can you still see where you pressed the screen?

If you can visually tell where you have pressed on your screen, AFTER removing your finger, it sounds like you have damaged your screen.

Dead = damaged.