Over the last few weeks, when I do certain exercises with my (5#) weights, I get an odd sensation under my skin. My muscles don't twitch, it doesn't hurt, but it feels really weird. It almost feels as if bubbles are being blown in between my muscles. I tried searching this site and google for it, but all it came up with were unrelated symptoms for menopause

Because it doesn't hurt, it doesn't really seem like a big deal to me, but I'd like to hear other opinions