Thanks for your query . I would be pleased to assist you with the same.
You seem to be having a condition called Neurodermatitis
which has an element of increased senstivity of the skin and an itch scratch cycle .
This cycle needs to be broken with intake of anti histamines
in the morning and doxepin at night . These are available as prescription from the Dermatologist
You can also apply Doxepin gel on the area to reduce the hyper sensitivity .
Thanks and Take care