Not sure what they are doing, I feel as if they are making a nest. Like when my dog pushes her blanket around with her nose until it is just so and then she lies on it. I have also told my husband it reminds me of a rattle snakes tail, how they make it vibrate and wiggle.
All of us that have them sure hope they are not actually burrowing down into our muscles, some do and then we get arthritis....that is why I keep saying to cleanse and get them out as soon as possible. Once they are in your muscles it is much harder to get them out, so keep cleansing!!! heyjude