[skin concern] I didn't pop these zits (pimples? whatever.) but they turned purple on their own. What are these? Why did they turn purple?

Beauty Tips For Body Care
https://i.reddituploads.com/29c1e7e8f7ae4f0383841a14bc650720?fit=max&h=1536&w=1536&s=35995cc46412e85b0377d9511e678c22
Girls Blog 2015
Submitted by maizycorn