1 day after FUE I hit my head on the plane roof when coming back home. Should I be worried? (Photo)

Accidents sometimes happen.  Hitting or bumping your head would not likely cause harm to your transplanted grafts unless the trauma was severe.

It's probably fine, assuming the bump wasn't very severe and it doesn't seem like there was much trauma. But there's no sure way to know right now over the internet, you really just have to wait and see if the area grows the same as your recipient area over the next year.

Thank you for posting your question. It's too early to find out at this stage if damage was caused to your grafts. If there was no bleeding involved or dislodged grafts, you are probably good. But only once you reach 100% growth 12 months out will you know.

There is nothing to worry unless there is bleeding. Dislodge of a graft/ grafts will cause a bleeding . Good luck 

If you hit your head and didn't see any bleeding then you likely didn't lose any grafts.  It looks like they are all intact.

If you did not see any bleeding out of the grafts in the area where you hit your head then the new hair should grow.  There isn't really anything you can do at this point, just waiting.

ıf you have no droplets of blood on your head or visualize any graft that has been popped out at the time of coupe, so it means you have no harm from that little trauma 

It's difficult to tell from the photo that you posted. I would call the clinic that performed your procedure and follow their advise. 

If there was not bleeding, I doubt that blunt trauma would have damaged any of the grafts. Bleeding usually indicates that a graft or more than one has come out