I’m a scratcher and worried about a hair transplant

I will use hair fibers when I go out, and if I take a quick shower before going to bed, there would still be some fiber that I didn’t get out. I wake up and notice black fibers under my nails which means I’m actively scratching my head during sleep. I am planning on doing my surgery in a few months and I’m worried about scratching while I’m sleeping. What can be done to stop this?

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