Answer:
I can be swallowed But I can also swallow you.
An action done on mosquito bites
I'll bring out your bulls and slow your roll. I may even come out of your skull.
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. Amidst a light brown grassy lawn with an outline of a green grass.
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.
A little house full of meat, no door to go in and eat.