Hi.. Can understand your concern.. As per your complain Bell s Palsy occurs due to trauma or infection of the facial Nerve which is the Seventh Cranial Nerve.. This nerve supplies the muscles of face and any disorder with this nerve causes weakening of facial muscles leading to muscle twitches, paralysis of muscles and difficulty in closing the eye on the affected side, drooling of saliva and deviation of chin on the unaffected side of face.. Infection leading to bell s palsy is caused by a number of viruses like herpes virus, adeno virus, cytomegalovirus,Mononucleosis etc.. The chances of recurrences are very less and but can be seen in some individuals but it is mostly seen after years ,you can say 8 to 10 years after the first infection but in a few rare patients frequent relapses can be seen .. I would suggest you to consult a doctor and get evaluated for the cause of pain behind the ear as it can be due to some other cause in case if you do not have any other symptoms like muscle weakness or twitching.. Hope this information helps.. If you find the answer helpful kindly write a positive review and click on found this answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora.