Grover's Disease - Hydration!
Drink much more water and keep hydrated the itchy areas until the inner hydration kicks in. I was diagnosed, tried everything and end up with this simple recipe. Now if a papule pops up, "Geez not enough water?" And grab a glass or two or three. Basically until it is gone.
At first, give it a few days and the 15 to 30 minutes. I think we become more susceptible to contaminants, processed food, pills, and they all increase our water (and fruits and veggie) demand.