There are some patients whose facial asymmetry can be improved by weakening the side that functions normally so that when the face is animated there is less of an obvious difference side to side. However, one must way the advantage with possible risk of too much relaxation and affecting the way one speaks, eats, smiles and creating difficulty while attempting to brush ones teeth.See a board certified neurologist, oral maxillofacial surgeon, plastic surgeon or dermatologist who is experienced in treating such conditions.The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice. The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs. If you are experiencing a medical emergency proceed to your nearest emergency room.