Bell's palsy is a nerve injury of the facial nerve which controls the muscles of facial expressions. Typically, there is no known cause why this happen (otherwise it is not called Bell's palsy), however a number of experts believed that a viral etiology is a culprit in many cases. One...
Soon after injection Botox binds irreversibly to muscle/nerve receptors preventing its contraction. The muscle/nerve unit is unable to function normally until it regenerates new receptors. This process takes 3-6 months, hence the duration of the Botox effect. Difficult to see how an ext...
