The most common form involves only the lower branch of the facial nerve and is seen only when the infant cries. The lower lip fails to pull down on the affected side giving the mouth an unbalanced appearance. Generally the nerve has been damaged by pressure rather than the nerve fibers torn, in which case a return to normal occurs over the next few weeks to months. And Tests Physical examination is usually sufficient to diagnose this condition. In most cases, observation to see if the paralysis will disappear is the only treatment.
Permanent paralysis requires special therapy.
Full spontaneous recovery is the typical outcome. Complications Permanent paralysis of facial muscles on the affected side occasionally occurs. This condition is generally diagnosed while the infant is in the hospital. Mild cases involving just the lower lip may escape observation and later be noticed by a parent, grandparent, or other visitor. If your infant crying infant's mouth looks unbalanced, you may want to call your health care provider.