Infant Facial Nerve Palsy

What is infant facial nerve palsy?

Infant facial nerve palsy is weakness or paralysis of the muscles on one side of a newborn’s face, caused by injury to the seventh cranial nerve (the facial nerve), most often from pressure on the nerve during birth. The facial nerve runs just under the skin near the front of the ear, where it is vulnerable to compression: from forceps, from the mother’s pelvic bones during a long labor, or from the baby’s own position. The result is a face that looks uneven, most obviously when the baby cries: one side moves normally while the affected side does not.

Most birth-related facial nerve palsy is a compression injury that resolves on its own within days to weeks. A smaller share reflects a more significant nerve injury, and a few cases are developmental (the nerve did not form normally) rather than birth-related, a distinction that matters for both prognosis and any legal question.

Is it “Bell’s palsy”? Clearing up the term

Many parents search for “infant Bell’s palsy,” so it is worth addressing the term directly. Strictly speaking, Bell’s palsy means facial paralysis with no identifiable cause (idiopathic), and it is a diagnosis of exclusion made mostly in older children and adults. A newborn whose facial weakness follows a forceps delivery or a difficult labor does not have Bell’s palsy; the cause is known (birth-related nerve compression or injury), so the accurate label is traumatic or birth-related facial nerve palsy. The distinction is not pedantic: calling a birth compression injury “Bell’s palsy” can obscure the fact that it had a cause, and that the cause was the delivery. If a clinician has used “Bell’s palsy” loosely, it is reasonable to ask whether a birth-related mechanism was considered.

Causes, including forceps delivery

• Forceps-assisted delivery: the classic cause; a forceps blade can press directly on the facial nerve where it crosses the jaw. This is the mechanism most associated with birth facial palsy.
• Pressure from the maternal pelvis (sacral promontory) during a prolonged or obstructed labor, even without instruments.
• Fetal position that presses the nerve against bone.
• Prematurity and larger birth weight as contributing factors.
• Developmental (non-traumatic) causes: rarely, the nerve is congenitally underdeveloped (as in Möbius syndrome), which is not a birth injury.

Signs and symptoms

• The face looks even at rest but pulls to one side when the baby cries (the unaffected side moves, the weak side stays slack)
• The eye on the affected side may not close fully
• The corner of the mouth droops and does not move; the nasolabial fold is flattened
• Difficulty with a full seal while feeding on the affected side
• Most birth facial palsy affects the lower face and one side only

Diagnosis

Diagnosis is clinical, based on the pattern of facial movement and the delivery history (particularly forceps use or a difficult labor). The main task is to distinguish a compression injury, which recovers, from a more complete nerve injury or a developmental cause. Where weakness does not improve, nerve-conduction studies or imaging may be used to clarify the extent and cause. The eye must be protected from drying if it cannot close.

Treatment and recovery outlook

The outlook is generally reassuring. Most birth-related facial nerve palsy from compression resolves spontaneously, commonly within the first few weeks and usually within a few months, as the bruised nerve recovers. Treatment during recovery focuses on protecting the eye (lubricating drops, sometimes taping the lid closed during sleep) and supporting feeding. When weakness persists beyond several months or the nerve was severely injured, referral to a specialist is warranted, and surgical options exist for the rare permanent cases. A developmental facial palsy does not recover in the same way and is managed differently.

Was it preventable?

Not every case of infant facial nerve palsy is malpractice. Many are mild compression injuries that resolve completely and occur even with careful delivery; a forceps delivery is sometimes the safest available option, and a transient facial palsy can be an acceptable trade-off. The standard of care asks whether instruments were indicated and applied correctly, whether excessive or misplaced force was used, and whether a persisting injury was properly evaluated rather than dismissed. A permanent facial palsy from misapplied forceps raises a different question than a transient weakness that clears in two weeks.

Legal options for families

Most facial nerve palsy resolves and supports no claim. The cases worth reviewing are those where a permanent or significant injury followed instrument use that may have been improperly indicated or applied, or where a serious injury was mislabeled and left unevaluated. Compensation in a permanent case can address surgery, therapy, and the functional and social effects of facial asymmetry. Because facial palsy often accompanies other forceps-related injuries, our guides to infant skull fracture and brachial plexus injury may be relevant. Filing deadlines vary by state; see our statute of limitations guide.

Where your case is handled depends on where the birth occurred: Banville Law attorneys are licensed in New York and Washington, D.C.; The Weitz Firm attorneys are licensed in Pennsylvania and New Jersey; elsewhere, the alliance connects families with its vetted network of local birth injury attorneys.

Frequently asked questions

Is my baby’s facial palsy the same as Bell’s palsy?

Usually not. Bell’s palsy means facial paralysis with no identifiable cause. When a newborn’s facial weakness follows a forceps delivery or difficult labor, the cause is known (birth-related nerve compression), so the accurate term is traumatic or birth-related facial nerve palsy, not Bell’s palsy.

Will my baby’s facial palsy go away?

In most birth-related cases, yes. Compression injuries typically recover on their own, often within a few weeks and usually within a few months. Injuries that persist beyond several months, or that were more severe, warrant specialist evaluation.

Does forceps delivery cause facial palsy?

It can. A forceps blade can press on the facial nerve near the jaw, and forceps delivery is the mechanism most associated with birth facial palsy. It does not always mean the forceps were used improperly, but it makes the delivery details worth reviewing.

How do I protect my baby’s eye if it won’t close?

Follow your pediatrician’s guidance; this usually involves lubricating eye drops or ointment and sometimes gently taping the lid closed during sleep to prevent the cornea from drying. Do not improvise; ask the care team for specific instructions.

Sources

This page is for general education and is not medical advice. Medical facts above are drawn from the cited primary sources; legal statements reflect the reviewing attorneys’ professional experience. Always consult your child’s physician about medical concerns.