Hello, Welcome to Just Answer and thanks for your question. They probably are not dangerous, but there is no way to tell what they are unless you have them examined by a medical professional. They can be infected pores, cysts, etc., but you would need to have them examined by your GP to tell.
My goodness, where did that come from? It probably is not cancer any more than a pimple on the end of your nose would be cancer. However, it can need antibiotics or opening and draining if they are boils. No way to tell without your GP taking a look.
Anything that isn't normally there can be described as a lump. It doesn't affect the fact that anything that wasn't there two weeks ago needs to be examined to determine what it is.
It probably isn't anything serious to scare you.