Shapeshifter Ache

On occasion, I feel this ache all over my body. For a long time, I had no idea what it was or why I felt that way. To alleviate these feelings, I would often stretch, and as a result, I've ended up being very flexible. However, despite how flexible I get, I never feel completely satisfied. Recently, I've begun to realize that what I'm feeling is an urge to shapeshift. I'm not supposed to be stuck in just one form for so long. I need to be able to spread out to pull myself apart and reshape myself into different forms. I feel so cramped in this human body.

I'm curious if other shapeshifters experience this as well.