I scratched my head in my sleep a month after my FUE transplant, what should I do. (photo)

It is doubtful that at one month you could really do any significant damage to your grafts, since they should be very well established in your scalp by now. Really only serious, intense trauma is going to affect them (the kind that leaves permanent scars) so scratching part of your scalp shouldn't be an issue.

Its normal to be concerned after a procedure, you just invested in yourself and want the best outcome.  However, at this point, 1 month, you can't scratch your scalp and hurt anything.  The scab will fall off normally but I recommend soaking you scalp for 5 minutes in a tub to accelerate the process.