I use DE food grade for the itching. It helps me a lot. I put it on like powder. First I put on mixture of coconut oil or any carrier oil mixed with clove, tea tree, lavender,and lemon EO. Then put de everywhere except face and hands. It can be drying to skin yet it keeps me from itching and I get 8 hrs of sleep. Benefit the Essential oils and de kill any lingering parasites. I never want to go thru this again so I also use this when I go out to prevent new ones from entering.