Can bumping your head or lightly touching your recipient area damage your hair transplant grafts 2 days post op? (Photo)

If the injury was severe enough to cause normal hair loss then it may affect your transplanted hairs.

If you have a bleeding and blood came out after you bumped up your head when you
were in air plane or getting in a car or bus, probably you may
missed a couple of grafts with dislodgement of them.ıf you have noticed no bleeding , do not worry. So I advise you to have a
visit your doctor.  

These things can happen and most times will not affect the results. If you did not have any bleeding or bruising in the area though, you most likely will be just fine and didn't dislodge any of the grafts.