Answer:
An action done on mosquito bites
I have all the knowledge you have. But I am so small that I can fit into your hands. What am I?
Though desert men once called me God today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
What side of a cat has the most fur?
It's in your hand though you can not feel it. Only you and time can reveal it.
Give it food and it will live, give it water and it will die.