Bell's Palsy is a harmless condition that causes muscle weakness or paralysis in some facial muscles. It can sometimes be alarming, especially when brought on suddenly, where parents experience one side of their face drooping.  Bell's Palsy is also called facial nerve paralysis or seventh nerve paralysis. This is where smiling may appear as a sneer. Symptoms tend to include weakness and paralysis on one side of the face, dropping eyelid and mouth, drooling, difficulty speaking, eating and drinking, dry mouth, eye dryness or tearing, difficulty tasting, pain in the jaw, headache, ringing in the ears and an increased sensitivity to sound.