Indention in arm after shot

Hi guys,

I was rubbing my upper / outer arm last night and noticed an area where there is an intention. About the size of a quarter. It feels like there is a void in my arm. Nothing under the skin. The muscle and fat are just gone. It is completely different on the other side. I was so weirded out and then I realized it is in the exact same place I got my Pfizer vaccine. After my second shot, my arm had a slight reaction and for about a week I had a swollen knot in my arm. Now, months later, I just notice this deep indention like hole in my arm mass. Does anyone else have this?? Could it be anything sinister?? Tried to find people with similar stories and nothing.

When you say no fat or muscle, is there just a layer of skin over your bone?

Yes it’s like if you press on the skin it just goes in for about a half and inch, where everywhere else doesn’t go in at all. There’s a circular “hole” in the muscle under my skin. I could only find “lipoatrophy” online which some people get after injections but I’m kind of freaked out