Hi
This issue started with me also at the age of 65 I am now 67 which is still hard to believe anyway. I too went to a dermatologist had biopsies done blood work everything's normal. Mine seems to come and go in Cycles it will completely clear up in the winter and then as soon as the warm weather hits in my arms are exposed it's there and I can barely tap my arms and they have a spot right now they're a mess and I'm so tired of it also there is a cream you can get from the health food store which I put on nightly that does seem to help them go away faster it is called arnica by A. Vogel is like a gel and make sure it says for bruises. That is the only thing I have found that actually helps get rid of them quicker. I find that sometimes I just wake up with them in the morning so in the night I must have scratched myself or something. It really plays on your mental health for some reason I think it's because of the comments people say when they see you without sleeves. I believe that my medication causes it and I believe it is from the Statin because when I went off it they disappeared. I hope you find some help with this. Unfortunately I have to take a Statin so I'm stuck with this and it also is on my shins