The Condition
Facial palsy is the loss of movement in some or all of the muscles of facial expression, caused by dysfunction of the facial nerve (cranial nerve VII). Common causes include Bell's palsy (idiopathic, the most frequent cause), injury during removal of a parotid tumour or acoustic neuroma (vestibular schwannoma), direct facial trauma, Ramsay Hunt syndrome, and rarer congenital causes such as Möbius syndrome. The functional and psychological impact can be considerable — affecting eye closure, speech, eating, drooling control and facial expression, alongside the visible asymmetry.
Assessment
Assessment includes grading of palsy severity (House-Brackmann or Sunnybrook scales), determining the cause and time since onset, and — critically — assessing the eye for adequate closure and protection. Where the eye cannot close fully, exposure of the cornea is an urgent concern that takes priority over any reanimation planning. Assessment is usually coordinated with ophthalmology, and speech and language therapy input is valuable for eating, drinking and speech.
Non-Surgical & Temporary Measures
- Eye lubrication, taping and protective measures where closure is incomplete
- Botulinum toxin — to the unaffected side to reduce asymmetry during recovery, to weaken specific overactive muscles causing synkinesis (unwanted, involuntary co-contraction, such as the eye narrowing when smiling), or to manage hemifacial spasm
- Facial neuromuscular retraining and physiotherapy
- Temporary eyelid weighting or tarsorrhaphy where eye protection is urgent
Physiotherapy & Facial Exercises
Specialist facial neuromuscular retraining is a core part of treatment at every stage — before surgery is considered, alongside non-surgical measures, and as an essential part of recovery after dynamic reanimation. This is a distinct physiotherapy sub-specialty, delivered by therapists with specific facial palsy training rather than general physiotherapy.
- Soft-tissue and massage techniques — to maintain tissue mobility and reduce tightness on the affected side
- Mirror-guided, small-movement retraining — slow, controlled facial exercises performed in front of a mirror to encourage symmetrical, coordinated movement rather than strong, exaggerated effort
- Synkinesis management — targeted techniques for unwanted, involuntary facial movements that can develop during nerve recovery (e.g. the eye narrowing when smiling)
- Post-reanimation retraining — after free muscle transfer or nerve transfer surgery, dedicated retraining teaches the transferred muscle or new nerve pathway to work with facial expression, typically over many months
Facial Palsy UK maintains a directory of specialist facial palsy physiotherapists across the UK, and can also advise on exercises appropriate to your specific presentation — see Useful Resources below. Physiotherapy referral is arranged as part of your treatment plan.
Static procedures, targeted denervation and dynamic reanimation are all significant operations. Each is offered only after careful individual analysis of the pattern, cause and duration of your palsy — there is no default operation, and the right option, or combination of options, is determined specifically for you at consultation.
Static Procedures
Static procedures do not restore active movement, but they reliably improve symmetry, function and eye protection. For many patients — particularly those with longstanding palsy, lower fitness for prolonged microsurgery, or where eye protection and symmetry at rest matter more than an active smile — static procedures are often the most effective and dependable option available, with a more predictable outcome and a considerably shorter recovery than dynamic reanimation.
- Gold or platinum upper eyelid weight — sits within the eyelid and uses gravity to restore blink and eye closure, protecting the cornea; one of the most reliably effective procedures in facial palsy surgery, and often the single change that makes the biggest difference to day-to-day comfort and eye health
- Lateral tarsorrhaphy or canthoplasty — supports and tightens the lower eyelid to reduce exposure, watering and irritation
- Brow suspension — elevates a heavy, ptotic brow that can otherwise obstruct vision
- Static slings (often using fascia lata) — support the midface and oral commissure at rest, improving symmetry and reducing drooling, though without active movement
Static procedures can be performed alone, combined with one another, or used alongside dynamic reanimation — and for some patients, a deliberate, standalone choice of static surgery is entirely appropriate where reliability and a shorter recovery matter more than restoring active movement.
Targeted Denervation for Synkinesis & Spasm
Where synkinesis — unwanted, involuntary co-contraction of facial muscles, such as the eye narrowing when smiling — or hemifacial spasm is the main problem, treatment aims to selectively weaken the specific overactive muscles responsible, rather than restore movement that has already returned.
- Chemodenervation (botulinum toxin) — targeted injections to the specific overactive muscle groups are the first-line treatment for synkinesis and spasm, and can be highly effective; treatment is repeated roughly every three to four months as the effect wears off
- Selective neurectomy or myectomy — for carefully selected patients with a well-defined, consistent pattern of synkinesis that responds well to botulinum toxin but is difficult to manage long-term with repeated injections, surgical division of the specific nerve branches or muscle fibres driving the unwanted movement can offer a more lasting solution
As with all facial palsy surgery, targeted denervation is only considered after careful, individual analysis of the specific pattern of synkinesis or spasm — the aim is to weaken exactly the muscles causing the problem without affecting normal movement elsewhere in the face.
Dynamic Reanimation
Dynamic techniques aim to restore active, ideally spontaneous, movement:
- Cross-facial nerve grafting — for early cases with a healthy contralateral facial nerve, a sural nerve graft connects the working side to the paralysed side, often as the first stage of a two-stage free muscle transfer
- Nerve transfer (e.g. masseteric-to-facial nerve transfer) — a faster route to reinnervation, particularly where surgery can be planned within the first 12–18 months of onset
- Free functional muscle transfer — most commonly a gracilis muscle flap, microsurgically transferred and reinnervated to recreate a smile; the mainstay for longstanding palsy where the native facial muscles are no longer viable
- Temporalis tendon transfer — repurposes the temporalis muscle to restore smile movement, an option for selected patients
Timing matters. Facial muscles that remain denervated for too long (broadly beyond 18–24 months) lose the capacity to be reinnervated directly, which is why earlier referral preserves more reconstructive options. Bell's palsy itself recovers substantially in the majority of patients without surgery — surgical reanimation is considered for palsy that fails to recover, or from causes unlikely to recover spontaneously.
Which Option Suits You
The right treatment depends on the cause of your palsy, how long ago it started, whether any nerve or muscle function remains, and your own priorities. This is assessed individually, but broadly:
- Recent onset (under ~12–18 months), some nerve function likely recoverable — non-surgical measures, eye protection and physiotherapy first, with cross-facial nerve grafting or nerve transfer considered if recovery stalls
- Longstanding palsy (beyond ~18–24 months) or facial muscles no longer viable — free functional muscle transfer (typically gracilis) or temporalis tendon transfer, as the native muscles can no longer be reinnervated directly
- Eye protection is the main concern, or a patient prefers not to pursue further surgery — eyelid weight, tarsorrhaphy or canthoplasty alone may be sufficient and appropriate
- Lower face and smile are the priority, with lower surgical appetite or fitness for prolonged microsurgery — temporalis tendon transfer offers a shorter, single-stage alternative to free muscle transfer
- Congenital palsy (e.g. Möbius syndrome) or bilateral palsy — free muscle transfer is often considered on both sides, planned in stages
These options are discussed individually and in detail at consultation — there is rarely a single "right answer," and the plan is built around what matters most to you.
What to Expect
Facial reanimation is often a staged process over 12–18 months or longer, particularly where two-stage free muscle transfer is required. Dedicated physiotherapy after dynamic surgery is essential to train the transferred muscle to move with facial expression. Results represent a meaningful improvement in symmetry, eye protection and smile — not a full return to pre-injury function.
Risks
Flap or Graft Failure
Uncommon with experienced microsurgical technique, but is a recognised risk of free muscle transfer and is discussed in detail before surgery.
Asymmetry
Some residual asymmetry is expected; further refinement procedures are sometimes needed.
Variable Movement
The degree of restored movement varies between individuals and cannot be fully predicted in advance.
Further Surgery
Reanimation is frequently a multi-stage process; revision procedures are common and planned for from the outset.