My left ear is blocked after face lift. Is this normal?

If the external auditory canal is not protected during the facelift blood can sometimes drip in and create an obstruction. This will need to be cleaned. It's possible a cotton ball was placed in the external auditory canal for protection and simply was not removed. In any event report this to your plastic surgeon.

This is something that can happen often and it will resolve on its own accord. Your PS could have a look in your ears to reassure you. 

 Sometimes during a facelift blood will get in the ear and dry in the canal.   it is possible that this is the case with your situation. I would discuss your concerns with your plastic surgeon and have them take a look in your ear before you do anything.