Thanks for the query.
You might be suffering from an auto immune condition like atopic dermatitis
or lichen planus
These disorders are itchy in nature and can only be controlled.
There is no permanent cure for this.
Use steroid lotion like desonide
Also take some anti histamine
This will give you relief.
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.