I have used Menthol available in Gold bond Power...The Foot power has the maximum amount of 1 %, others body powers O.5% ! Put it down my tee shirt at night and plenty of covers will swear out Red dots! Works and relief from itching,,,,but no easy cure! Also started using a "Nervive" cream" with 1% menthol with lidocaine. clear liquid but more expensive than powder!