Causes of facial palsy<br /><br />Facial palsy occurs when the muscles on one side of the face weaken.<br /><br />How does facial palsy happen?<br /><br />This mostly happens in the winter season since the virus affects the facial nerves and weakens them. <br /><br />Symptoms of facial palsy<br /> <br />Facial palsy can cause sudden weakness or paralysis of the facial muscles, affecting daily activities and expressions.
