Keep cake supplies topped up
Administer cuddles liberally
Don't skimp on the calamine cream
The good old fashioned remedies are the best - oats in the bath (or Aveeno colloidal bath powder) and a spoonful of bicarb for good measure (in the bath, not in the patient)
Order in some extra patience (and gin)
Remember that this too shall pass...
Give up on sleep for at least a couple of nights and treat yourself to some seriously nice coffee beans for freshly ground coffee instead
Remember baths can be a great distraction technique as well as cooling them down and relieving the itch (more oats please) - we're on our 2nd bath of the day and it's only 10am.
Repeat: this too shall pass...
Administer more cake. Repeat as required.