Answer:
An action done on mosquito bites
I can fall off a building and live but in water I will die.
I am always in front of you but you will never see me
I have memories, but none of my own. Whatever's on my inside is what is shown. If I'm ever different, it's because you changed me. I feel like a decoration, here for you to arrange me. What am I?
What goes into the water black and comes out red?
What begins and has no end? What is the ending of all that begins?