I'm not sure what this is. Abnormal Skin Growth?

Dear all,

I am a 17 year old male. And for awhile now I have had these... spot like objects on my skin. They do not itch, they do not hurt, they do not become pimples or acne or whatever. Sometimes I get curious and I try burst them, a very small amount of clear liquid seems to come out. It is on the side of my arm (bicep area), on my back and my chest. Below are photos of the areas affected.

Chest
http://i11.photobucket.com/albums/a156/ivanduong/IMG_0203.jpg
http://i11.photobucket.com/albums/a156/ivanduong/IMG_0204.jpg

Arm
http://i11.photobucket.com/albums/a156/ivanduong/IMG_0205.jpg
http://i11.photobucket.com/albums/a156/ivanduong/IMG_0206.jpg

Back
http://i11.photobucket.com/albums/a156/ivanduong/IMG_0207.jpg

Please help me and perhaps guide me to removing these spots as they are severely affecting my self confidence... While I am on the topic, no matter how hard I try I do not seem to be able to stop acne from forming on my back and this has been happening for a good couple of years now. (Seen on photo) Do you have any advice or tips?

Also I think it might be useful to mention that these seem to have began after suffering from Scarlet Fever, and shortly after scarlet fever, I have been getting mosquito bite like shapes on my skin either randomly or eating some sort of food or even just having something pressed on it. It looks like this:
http://i11.photobucket.com/albums/a156/ivanduong/IMG_0208.jpg

I hope I did not ask too many questions, I am worried however.

Thank you so much!
Your help is very much appreciated.

Thank you again.
Ivan