Why can't I bend my head after hair transplant? My surgeon told me it's better not to.

You'll want to check with your surgeon if the bending you did caused any problems.In general, bending is not recommended because if increased pressure in the recipient area and increases the chance of the grafts coming out - a phenomenon called 'graft popping'However, there's a whole spectrum of bending from very slow short duration bending with minimal angle to fast, rapid succession acrobatic cartwheel-like flips. The former would be unlikely to cause much of a problem whereas the latter would almost certainly cause popping. You're wise to have stopped these movements as you've invested quite a great deal into the procedure to do anything that might compromise the result. If you're concerned, check in with your hair transplant surgeon. He or she can tell you if there are any problems that resulted from these movements.

Since your surgeons knows you, it would not be right for me to respond differently. Maybe your surgeon knows something you are not telling us here on the internet.