When flying, you can usually only sit on top of the seat, not lying down, so you must be absolutely bedridden after surgery. In addition, if the lower limbs must be straightened after surgery, it is very troublesome to fly, so you cannot fly either. Injuries to internal organs, such as liver rupture, spleen rupture or heart rupture, lung rupture, etc., are not allowed to fly after surgery if they have not fully recovered or if their condition is not yet stable. In the case of cranio-cerebral trauma surgery, you should be absolutely bedridden after surgery, and you should not fly if you are still not awake.