About 3 months ago I started realizing that my chest muscles will randomly twitch and move when I open up my chest (think doing a DB fly). You can see the muscles moving when it happens and if I run my finger Along the edge of the muscles they move in the same waving fashion. It’s painless so I was wondering if you could help figure out what this is and what to do about it.
This is common and is not usually of significant concern unless accompanied by other problems like progressive weakness, loss of sensation, etc.