if they're kind of just like blood bubbles under your skin then don't worry about it but stop popping them! sometimes it's just small blood vessels that appear under the skin, nothing alarming. I can't tell from your description if that is what you have but if it is don't stress it :)
Weight changes can do that too, so many changes to the body and skin! congratulations by the way.
Hello and congrats on your weight loss! That's great :)
I really don't know what they could be from, the only thing I wanted to ask, is are you working out now to lose the weight? What are you wearing if so? That's the only thing I could think of, is maybe your workout clothes are causing it, or the friction of working out itself. Hopefully somebody else can chime in with some more answers or ideas. I wish you continued success on your weight loss!