B group vitamins are supposed to help with nerve healing, best to check if they’re okay with any other meds you’re on…as @Isaiah_40_31 says, paralysis of the facial nerve is quite common after surgery , if you search for droopy lip it’ll probably come up with quite a few mentions…some members suggest (once your incision has healed) doing massage gently, & using a feather for example to wake up the nerve, @Isaiah_40_31 also posted this link for exercises to do once healed:
Day 11 Post-op Left sided stylohyoid ligament surgery - Photos - General - Living with Eagle
Eating normally & difficulty brushing teeth is common too after surgery, often because you can’t open your mouth wide, mine was like that post surgery for about 10 days.
Take care 
1 Like