What can seem to drive you insane becomes mundane with the due diligence of everyday mindfulness.
Irritation is nothing more than an Algebraic equation with X being the unknown source of what ails you.
Take the time to define X and the itch becomes less complex.
But if you must
A scratch here is acceptable
A scratch there is pushing it
Finding that perfect tree and backing up like a Grizzly Bear is totally uncalled for.
The sum of your efforts will give you the treatment plan to avoid even the most aggressive infections.