Hi Everyone,
Ginger can be an allergen!:

IgE-mediated reactions
Ginger may uncommonly induce symptoms of food allergy in sensitized
individuals. Symptoms include dermatitis, contact dermatitis, eczema, and
pompholyx eczema.

http://www.unicapinvitrosight.com/templates/Allergens.asp?id=2445

  Several hours later, I woke up during the night
> > covered in sweat.  Could the ginger have done that???

(I get night sweats from eggs and gluten.)

Paleobest,
Susan