Crocodile Tears Syndrome Treatment
What Crocodile Tears Syndrome Is
Crocodile tears syndrome causes you to shed tears when you eat, chew, or smell food. The tearing is not emotional. It happens on the same side of the face as a past facial nerve injury, and it can feel embarrassing in social meals. Doctors also call this condition Bogorad syndrome or gustatory epiphora.
Your facial nerve controls both your tear gland and your salivary glands. After the nerve gets damaged and regrows, some of the fibers end up in the wrong place. Instead of telling your salivary gland to make saliva when you eat, those fibers now tell your tear gland to make tears. This mix-up is called aberrant regeneration, and it is a well-documented complication of facial nerve injury.
Anyone who has had a facial nerve injury can develop crocodile tears. The most common triggers are Bell's palsy, trauma to the parotid gland area, parotid surgery, and birth injuries that damage the facial nerve. Symptoms usually appear months after the original nerve injury, once the nerve has had time to regrow along the wrong path.
How the Syndrome Feels Day to Day
You start to tear from one eye as soon as you take a bite or smell something savory. The side that tears is the same side where your face was weak or paralyzed in the past. Tears can run down your cheek throughout the meal and stop when you finish eating. Some patients tear from strong smells alone, even without food in the mouth.
Many patients feel self-conscious about crying during meals, especially in restaurants or at work lunches. You may start to avoid social dining or wipe your eye repeatedly, which can irritate the skin. The condition does not damage your eye, but the daily disruption can wear on quality of life.
Gustatory epiphora is different from watery eyes caused by blocked tear ducts, dry eye, or allergies. If your eye waters in the wind, after reading, or when you wake up, that points to a different cause. True crocodile tears link directly to eating, chewing, or food smells.
How Your Doctor Makes the Diagnosis
Your eye doctor will ask about past facial weakness, Bell's palsy, parotid surgery, ear surgery, or facial trauma. The tearing pattern is the key clue. Tearing that starts only with eating, on the same side as a past facial nerve injury, points strongly to gustatory epiphora.
Some doctors ask you to chew a piece of food or a cracker during the exam and watch for tearing on the affected side. The response is usually fast and obvious. The Schirmer test, a small paper strip placed inside the lower lid, can measure tear production before and during chewing to confirm the diagnosis.
Your doctor will also check your tear drainage, eyelid position, and corneal surface. Patients with a history of Bell's palsy can have lagophthalmos, an eyelid that does not close fully, which causes its own tearing. Treating both problems together often gives the best relief.
Treatment Options
Injection of botulinum toxin type A into the tear gland is the standard first treatment for crocodile tears syndrome. The injection blocks the misdirected nerve signals that cause tearing during meals. Your doctor places a small amount of toxin into the palpebral lobe of the tear gland, which sits just under the outer part of the upper eyelid. The procedure takes minutes and uses a 30-gauge needle, which is very fine.
Doses vary by technique. Published reports describe injections of 5 to 16 units of botulinum toxin A per session, with 6 units given transconjunctivally producing near-complete resolution of symptoms in most patients (StatPearls, 2024). Relief usually lasts about 6 months before re-injection is needed (StatPearls, 2024).
Your doctor numbs the area with eye drops or a small amount of local anesthetic. You may feel brief pressure as the needle goes in. Most patients tolerate the procedure in the office without sedation. You can drive home afterward and resume normal activity the same day.
The most common side effect is a droopy upper eyelid, called ptosis, on the treated side. This happens when the toxin spreads to the muscle that lifts the lid. Ptosis is temporary and fades as the toxin wears off, usually within weeks. Dry eye can also occur because the toxin reduces tear production overall. Using preservative-free artificial tears during the treatment period helps. Bruising at the injection site is common and fades quickly.
If botulinum toxin does not work or a patient cannot tolerate repeat injections, your doctor may discuss surgical removal of part of the tear gland. Surgery is reserved for refractory cases because it is permanent and removes the option to adjust treatment later. Most patients get good control with botulinum toxin alone and do not need surgery.
Living With and Managing Crocodile Tears
Because the effect of botulinum toxin wears off, most patients return for repeat injections every 6 to 12 months. Your doctor will track how long your relief lasts and adjust the dose. Some patients need slightly more toxin at the second visit, some slightly less. Keeping a simple log of when tearing returns helps your doctor fine-tune the schedule.
Many patients with crocodile tears also have lingering facial weakness, eyelid closure problems, or mouth asymmetry from the original nerve injury. Ask your eye doctor about combined care. Treating lagophthalmos and gustatory tearing together often gives much better day-to-day comfort.
Frequent wiping and facial nerve weakness can both irritate the cornea. Use preservative-free artificial tears during the day. If the eyelid does not close fully at night, your doctor may prescribe a lubricating ointment at bedtime and recommend a moisture shield or tape to keep the eye covered.
Call if you notice new eye redness, pain, blurred vision, or discharge after a botulinum toxin injection. Also call if the droopy lid does not improve within a few weeks, if you develop double vision, or if your tearing returns much earlier than expected. Most complications are mild and respond to simple adjustments in treatment.
Common Questions About Crocodile Tears Treatment
Crocodile tears rarely resolve on their own because the nerve fibers have already regrown into the wrong gland. The wiring does not usually unwire itself. Treatment with botulinum toxin controls the symptom but does not reverse the underlying nerve mix-up.
Most doctors wait until the original facial nerve injury has fully healed and the tearing pattern is stable, usually several months after the initial event. Treating too early risks masking natural recovery. If you are tearing with meals several months after a Bell's palsy and the pattern is not improving, ask your eye doctor about treatment options.
Botulinum toxin is not usually given during pregnancy or breastfeeding because safety data are limited. If you are planning a pregnancy or are currently nursing, tell your doctor so you can plan your injection schedule accordingly.
Coverage varies by plan and country. Many insurers cover botulinum toxin for gustatory epiphora because it is a functional, not cosmetic, treatment. Your doctor's office can help with a letter of medical necessity if needed.
Over-the-counter eye drops do not stop crocodile tears because the problem is extra tear production, not surface irritation. Artificial tears can still help if the wiping and rubbing have dried your eye, but they will not fix the underlying cause.
Most patients look no different after the injection. A small number develop a temporary droopy upper eyelid, which fades within weeks. The injection is placed far from the muscles that shape your smile or forehead, so facial expression is not affected.
Getting Care for Crocodile Tears
If you tear from one eye every time you eat and you have a history of facial nerve injury, you likely have gustatory epiphora. Schedule a visit with an oculoplastic surgeon or your eye doctor to discuss botulinum toxin treatment. Most patients get strong, lasting relief from a short in-office procedure and return to comfortable meals within days.