Permethrin is a kind of skin drug that is utilized for the treatment of scabies (a condition caused by tiny insects). It works by eradicating the miltes and their eggs. It comes cream form to apply to the skin. Also, it is available in a form of lotion to apply to the scalp & hair. You can also apply in your skin folds like between the toes. Don't use more of it or use the Permethrin more often than prescribed by your physician. Wash off the cream after 8 to 14hrs by taking a bath.