Thanks for the query.
There is a possibility that you have developed a recurrent infection.
Dont worry it can be treated easily.
Please go for a permethrin application once again.
It should be done for all the members of family.
Please meet a dermatologist
for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.