“Feeling” can be of neurological nature. Makes sense to consider anything not specific to brain only and having nerve healing component. NGF maybe?
If you are into paid options, than
which also comes with Plasma Brain (might help on its own) is good. Blood circulation in the healed area can also differ, on capillary level, so maybe Far Infrared or Circulatory Engineer, albeit the latter doesn’t mention capillaries. And some search though forum sheds more info, for example, like this post.