I think @windyshores is right - these are normal, unless they become numerous, bleed through the skin or you have other symptoms, as my friends like to say "Welcome to the joys of an aging body." I get them on my ankles if I am on my feet too much without proper shoes and on my face when I cough hard - that never happened when I was younger.
For example, yesterday my PT was evaluating some new symptoms in a previously repaired (not replaced) knee - after several minutes of manipulation, he said "The miniscus feels a little ragged around the edges." My reply - "not surprised, I've been using it for 72 years!"
Sue