If a case of scabies then the permethrin would be correct treatment ...
You Will probably need other measures to help itching as the permethrin kills the mite that causes scabies but it takes time for the skin irritation and itching to settle down...
You may benefit to try antihistamines ( a combination of oral /// Zyrtec -- Benadryl -- Allegra + topical benadryl )
A steroid cream may help settle inflanmaton
Apply cold washcloth rather than scratching ..
If question or ongoing problem then see dermatologist ...
I hope that this information is helpful for you
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Thank you and Best Regards,
Anthony Bray MD
PS I will be happy to send offer for phone conversation as well if that would be helpful for you