 [ Symptoms ] what are common causes of chronic diarrhea [ Disease ] hi in order to figure out whether healing of the nerve is taking place or not there must be a ncv test or emg as the nerve injury differs from a case to another some injuries heals on its own from weeks to months according to the degree of degeneration of the nerve…and other injuries may be complete damage of the nerve which is not going to heal… generally having some sensations getting better than before is a good sign but this is not enough… doing physiotherapy for your face muscles and nerve stimulation would help you recover faster… regards