Hello!  Thank you for your question!  Numbness after any surgical  procedure is expected for several weeks to months following.  As the  nerves to the area are traumatized and will then experience a temporary  neuropraxia, a transient loss of nerve conduction.  This usually  resolves over the next 6-12 weeks, but depending on the procedure  performed, sometimes much longer.  Typically this should resolve by 1  year.  As it goes past this date, the likelihood of the sensation  returning is small.  However, it can take up to 2 years.  If no return  from there, it is unlikely to return.  It should be discussed that  persistent sensory changes may develop following any surgical  procedure.   Given the traumatic incident for your case, it is possible that you may have persistent numbness, and or facial paralysis.  Only time will tell at this point.The usual signs of the nerves regenerating and neuropraxia  resolving is itching, followed by a burning sensation and then  occasional sharp, shock-like pains.  These will be normal to experience,  and actually a promising sign.  Usually, normal sensation returns, but  is is also possible to have decreased sensation or even increased  sensation to the areas affected.  Re-educating nerves postoperatively is  often helpful and will allow proper instruction for the affected  sensory nerves - methods include using different textures to the  affected areas when showering, bathing, applying lotion, etc.  If  bothersome, there are some medications that may be helpful, including  Neurontin for pain for hypersensitivity.  You can try various textures  such as washcloths, loofahs, cotton sheets, etc.  Massaging the areas is  also beneficial for the incision to make the finest scar possible.  The  last place to regain the sensation will be directly adjacent to the  incision/scar as the nerves will make its way from the periphery to this  location.  If continual pain arises, evaluation is warranted.  After  ruling out other causes, one rare explanation may be that a neuroma has  developed and may require surgical excision.  This is very unlikely  unless a large sensory nerve has been transected inadvertently during  the procedure.  Hope that this helps!  Best wishes!