Lacrimation (eye tearing) - Causes, Treatment & When to See a Doctor

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What is Lacrimation (eye tearing)?

Lacrimation, commonly referred to as eye tearing, is the production and discharge of tears from the lacrimal glands that line the upper outer portion of each eye. Tears keep the ocular surface moist, protect against infection, and help clear irritants. While normal tearing is essential for eye health, excessive or abnormal tearing—known medically as epiphora—can be a symptom of an underlying condition.

In most people, a small amount of tears is continuously produced and drained through the puncta (tiny openings on the inner eyelid margin) into the nasolacrimal duct, eventually emptying into the nose. When this delicate balance is disrupted, tears may overflow onto the face, cause blurry vision, or lead to irritation.

Common Causes

Several ocular and systemic conditions can increase tear production or obstruct drainage. Below are the most frequently encountered causes:

• Allergic conjunctivitis – pollen, pet dander, or dust trigger histamine release, leading to itchy, watery eyes.
• Dry eye syndrome – paradoxically, dryness can stimulate reflex tearing as the eye attempts to compensate.
• Blepharitis – inflammation of the eyelid margins interferes with normal tear spread.
• Infectious conjunctivitis (viral or bacterial) – the classic “pink eye” often presents with tearing, discharge, and redness.
• Foreign body or chemical irritation – dust, sand, smoke, or exposure to chlorine cause an immediate tearing response.
• Nasolacrimal duct obstruction (NLDO) – blockage of the drainage pathway leads to tear overflow.
• Ectropion or entropion – eyelid malposition prevents proper tear distribution or drainage.
• Contact lens wear – poorly fitting lenses or prolonged wear can irritate the ocular surface.
• Eye surgery or trauma – procedures like cataract extraction or injuries can temporarily increase tearing.
• Systemic conditions – rheumatoid arthritis, sarcoidosis, or thyroid eye disease may affect lacrimal function.

Associated Symptoms

Depending on the underlying cause, lacrimation may be accompanied by one or more of the following signs:

• Redness (conjunctival injection)
• Itching or burning sensation
• Grittiness or foreign‑body sensation
• Photophobia (light sensitivity)
• Blurred vision that improves after blinking
• Discharge that is clear, mucoid, or purulent
• Swelling of the eyelids or surrounding skin
• Crusting of lashes, especially upon waking
• Pain around the eye or forehead
• Feeling of fullness in the inner corner of the eye (nasolacrimal duct blockage)

When to See a Doctor

Most cases of tearing are mild and self‑limiting, but you should seek professional evaluation if you notice any of the following:

• Tearing that persists for more than a week without an obvious cause.
• Severe pain, especially if it is sudden or throbbing.
• Vision changes—blurriness that does not clear with blinking, double vision, or loss of vision.
• Discharge that is thick, yellow/green, or foul‑smelling (suggesting bacterial infection).
• Swelling, redness, or warmth around the eye that spreads to the cheeks or forehead.
• Recurrent tearing after previous treatment, or tearing that interferes with daily activities.
• History of eye injury, recent eye surgery, or contact lens complications.

Diagnosis

Evaluation typically begins with a detailed medical history and a thorough eye exam performed by an optometrist or ophthalmologist.

1. History taking – onset, duration, triggers (allergens, contact lens use), systemic diseases, medications.
2. Visual acuity test – to rule out vision loss.
3. Slit‑lamp examination – magnified view of the eyelids, conjunctiva, cornea, and tear film.
4. Fluorescein staining – dye highlights corneal abrasions or dry‑eye damage.
5. Schirmer test – measures baseline tear production using a filter strip placed under the lower eyelid.
6. Nasolacrimal duct irrigation (flush test) – assesses drainage patency.
7. Allergy testing – skin prick or serum IgE testing if allergic conjunctivitis is suspected.
8. Imaging (CT or MRI) – rarely needed, but may be ordered if a tumor or sinus disease is considered.

Laboratory studies are generally not required unless systemic disease (e.g., autoimmune disorder) is suspected.

Treatment Options

Treatment is tailored to the root cause. Below are common therapeutic approaches, ranging from home care to prescription medications.

1. Allergic or Irritant‑Related Tearing

• Artificial tears ( preservative‑free) – dilute irritants and stabilize the tear film.
• Topical antihistamine/mast‑cell stabilizer drops (e.g., ketotifen, olopatadine) – reduce itching and tearing.
• Oral antihistamines (cetirizine, loratadine) for systemic allergy control.
• Cold compresses – soothe inflamed conjunctiva.
• Avoidance measures – stay indoors on high pollen days, use air filters, wear protective eyewear.

2. Dry Eye Syndrome

• Preservative‑free lubricating drops (every 2–4 hours).
• Warm compresses and lid hygiene to improve meibomian gland function.
• Prescription cyclosporine (Restasis) or lifitegrast (Xiidra) to increase tear production.
• Omega‑3 fatty acid supplements (1 g/day) have modest benefit.

3. Blepharitis or Meibomian Gland Dysfunction

• Daily eyelid scrubs with diluted baby shampoo or commercial lid wipes.
• Warm compresses for 5–10 minutes, followed by gentle lid massage.
• Topical antibiotics (e.g., erythromycin ointment) if bacterial overgrowth is documented.

4. Infectious Conjunctivitis

• Viral: usually self‑limited; supportive care with lubricants and cold compresses.
• Bacterial: topical antibiotics (trimethoprim‑polymyxin B, fluoroquinolones) for 5–7 days.
• Must practice strict hand hygiene to prevent spread.

5. Nasolacrimal Duct Obstruction

• Gentle massage of the lacrimal sac (“Crigler massage”) for infants or mild adult blockage.
• Probing and silicone intubation performed by an ophthalmic surgeon.
• Dacryocystorhinostomy (DCR) – surgical creation of a new drainage pathway for chronic obstruction.

6. Eyelid Malposition (Ectropion/Entropion)

• Lubricating ointments at night to protect the ocular surface.
• Surgical correction (lid tightening or repositioning) when conservative measures fail.

7. Contact Lens‑Related Tearing

• Ensure proper lens fit; replace lenses as scheduled.
• Use rewetting drops compatible with lenses.
• Take regular “lens‑free” days to allow the eye to recover.

8. General Home Care

• Stay hydrated; systemic dehydration can reduce tear volume.
• Use a humidifier in dry environments.
• Avoid smoking and second‑hand smoke, which irritate the ocular surface.
• Limit screen time or apply the 20‑20‑20 rule (every 20 minutes look 20 feet away for 20 seconds) to reduce ocular surface stress.

Prevention Tips

While not all causes of lacrimation are preventable, many can be minimized with simple lifestyle and eye‑care habits:

• Allergy control – keep windows closed on high‑pollen days, use HEPA filters, and wash face/eyes after outdoor exposure.
• Proper eyelid hygiene – clean lids nightly, especially if you have rosacea or blepharitis.
• Safe contact lens practices – wash hands before handling lenses, replace lenses and cases on schedule.
• Protective eyewear – wear goggles when swimming, cleaning, or working with chemicals.
• Regular eye exams – early detection of drainage problems or eyelid malposition.
• Balanced diet – foods rich in omega‑3 fatty acids (salmon, flaxseed) support tear film health.
• Avoid prolonged exposure to dry air – use humidifiers in heated rooms.

Emergency Warning Signs

Key Takeaways

Lacrimation is a normal protective reflex, but excessive or abnormal tearing often signals an underlying ocular or systemic problem. Understanding the common causes—from allergies and dry eye to nasolacrimal duct blockage—helps you seek appropriate treatment early. Simple home measures can relieve many cases, while persistent or painful tearing warrants professional evaluation. Prompt attention to emergency warning signs can prevent serious complications and preserve vision.

References:

• Mayo Clinic. “Conjunctivitis.” https://www.mayoclinic.org
• American Academy of Ophthalmology. “Dry Eye.” https://www.aao.org
• Cleveland Clinic. “Blepharitis.” https://my.clevelandclinic.org
• National Eye Institute (NIH). “Nasolacrimal Duct Obstruction.” https://www.nei.nih.gov
• World Health Organization. “Allergic Conjunctivitis.” https://www.who.int

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