When we say there is a feeling of numbness or a feeling of nothing, it’s often because there is a feeling there.
There are sensations with images and words associated with it, and these together creates the experience of numbness and nothingness.
Numbness is often alive with sensations, images, and words. And the same goes for an experience of nothingness.
Whenever I work with a client (myself or someone else), and the client says there is a feeling of X it’s usually because there literally is a feeling there, a sensation combined with some images and words. And that’s often helpful to explore.