Are Morgellons treatable by ingesting or topically applying borax? If so, what are the dangers?

This is an inaccurate and potentially dangerous idea. There are many noxious materials that can have a deleterious effect on the Morgellons. The problem is delivering the agent into a physical body that is infested with these organisms in a safe manner, because most such noxious materials will harm living tissue, or be ineffective and thereby safe because they will not do anything to normal tissue either. That is why the divine solution is superior to anything currently known. The only downside being the need for belief in the divine, which can be a hurdle for some people needing treatment. This can be made up for by the practitioner working on their behalf and that is a far preferable choice.