If one scratched his head with his wrist, must he wash his hands?
If the fingers did not scratch the head, but rather only his palm or back of the hand, some write washing is not required.<a href="#_ftn1" name="_ftnref1">[1]</a>
<a href="#_ftnref1" name="_ftn1">[1]</a> See Piskeiy Teshuvos 4:23 in name of Chazon Ish

Shulchan Aruch HaRav | ❓ֺֺIf one scratched his head with his wrist, must he wash his hands?

If one scratched his head with his wrist, must he wash his hands? If the fingers did not scratch the head, but rather only his palm or back of the hand, some write washing is not required.[1] [1] See Piskeiy Teshuvos 4:23 in name of Chazon Ish