When I press hard on my iPhone 6s screen I see a liquid, is this damaging my phone? Please read

[iMore Question]

Every time I apply force to my screen a liquid looking thing pops up on my screen, is it damaging to my phone? Also, if I drop my phone or it gets hit, could that affect any internal parts of my 6s, how strong are the internal parts

 

[Branta]

Are you sure you're not seeing 3D Touch in action? The screen can sense extra pressure and is programmed to respond.

The only thing likely to break if you drop your phone in normal use is the screen. The internal parts are unlikely to be damaged unless the drop is extreme, and the screen is more likely to be broken anyway (as well) in a severe impact.