What is the primary cause of Bell's Palsy?

The primary cause of Bell's Palsy is attributed to inflammation or viral infection of the facial nerve. This condition typically results from the reactivation of the herpes simplex virus, which can lead to swelling of the facial nerve, impairing its function. The inflammation disrupts the nerve's ability to control facial muscles on one side of the face, resulting in sudden onset weakness or paralysis, drooping of the mouth, and difficulty with facial expressions. Understanding the link between viral infections and neuroinflammation provides insight into the pathophysiological mechanisms behind Bell's Palsy and highlights the importance of prompt diagnosis and management of facial nerve dysfunction.