Morgan’s Ointments
The salve which Morgan made and gave to her brother Arthur would heal any wound, even one on a joint or a nerve, within a week, if applied once every day. Morgan gave the Lady of Noroison a box of ointment which cured madness when rubbed into the temples of the sufferer.
These two salves might be identical, or only two of the many Morgan could probably make. I see nothing to prevent anyone from theorizing either way.
See also
Morgan the Wise | The Legend of King Arthur
Ywaine | The Legend of King Arthur