Based on your description, occasional numbness or a “scratchy” numb feeling over the scalp that appears during sleep and settles within a few seconds after waking is most commonly due to temporary pressure on scalp nerves or blood vessels. This can happen because of sleeping position, pressure from a pillow, or mild neck muscle tension. Once you change position or wake up, blood flow and nerve sensation return, so the feeling settles quickly.
Next Steps
Try using a comfortable pillow that supports your neck well.
Health Tips
if the numbness become frequent, please consult for further management and evaluation. thank you.