Thanks for the query,
you might be suffering from scabies
Your description matches with this.
Also It is quiet common infection an child hood.
It will be better to consider an application of permethrin.
Also take an anti histamine
This will control the itch.
Please meet a dermatologist
for exact diagnosis.
And get the medication prescribed.
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 good health,