your cells are sensitive to charge in general - cells attempt to maintain certain voltage differentials across their membranes via ion channels in the cell membrane, can communicate voltage information with each other via gap junctions, etc. That electrical communication does control how cells behave.

If you have 20 minutes to watch this ted talk interview I highly recommend it. My mind was blown. Your DNA determines the hardware, but there's a lot of non chemical communication that goes on between cells that determine how they behave.

https://www.youtube.com/watch?v=XheAMrS8Q1c

Once you realize that cells can effectively communicate with each other via voltage, things like whats described about electrical bandages become less surprising.

If you've got a little more time (2 hours) there's a much longer more detailed interview here:

https://www.youtube.com/watch?v=Z0TNfysTazc

This is some next level stuff. Imagine DNA describes what your hardware looks like, but the software your cells run may be bioelectrical in large enough ways to consider that maybe your skin has some level cognition.