Why Are My Eyes Tearing All the Time?

Patients describe tears running down the cheek in wind or cold, dabbing the eye repeatedly, blurred vision that clears when they blink, and sometimes crusting or a sticky corner in the morning. It is annoying and confusing — many assume watering means their eyes are too wet, when often the real problem is a surface that is too dry and irritated. They want to know why it keeps happening and how to make it stop.

Tears are made along the upper outer eye, spread by blinking, and drain through tiny openings (puncta) at the inner corners into the tear sac and down the nasolacrimal duct into the nose. Watering results when any part of that loop fails.

If drainage is blocked, or the lids no longer hug the eye to pump tears along, fluid backs up and spills over. If the surface is irritated — from dryness, allergy, a rubbing lash, or a foreign body — the tear glands respond with a flood of reflex tears that overwhelm even normal drainage. Vision may blur intermittently because a shifting tear film distorts the image, clearing each time you blink.

Reflex (overproduction) tearing is driven by surface irritation. Dry eye is the leading example: an unstable tear film leaves dry spots that trigger bursts of watering. Allergies, blepharitis (lid-margin inflammation), a stray inward lash (trichiasis), ectropion or entropion, or a foreign body all provoke the same reflex.

Drainage (outflow) failure is the other mechanism. A blocked nasolacrimal duct — common in older adults, sometimes after infections or inflammation — prevents tears from reaching the nose, so they overflow, often with mucous discharge, and can lead to a swollen, tender tear sac. Punctal stenosis (narrowed openings) does the same on a smaller scale. Age-related lid laxity and ectropion pull the drainage puncta away from the tear film and weaken the blink pump. Because a dry, irritated eye and a poorly draining eye look identical to the patient, distinguishing them requires an examination, not self-diagnosis.

Watery eyes are usually a nuisance, but see an eye doctor promptly if you notice:

• A red, swollen, tender lump at the inner corner near the nose, possibly with fever (tear-sac infection)
• Thick pus, marked redness, or eye pain
• Light sensitivity, a scratchy foreign-body feeling, or vision that does not clear with blinking
• Tearing that starts after an injury or chemical splash
• One eye tearing with a visible lump or lesion on the lid

Any sudden vision change, severe pain, or trauma warrants urgent care.

The doctor sorts overproduction from poor drainage. A slit-lamp exam checks the tear film and surface for dryness, blepharitis, allergy, stray lashes, and lid position, and tear-film tests (breakup time or staining) help confirm dry eye. To assess drainage, the puncta are inspected and the tear duct may be gently irrigated to see whether it is open or blocked, sometimes with a dye disappearance test. Lid laxity and the position of the drainage openings are checked, since a loose or everted lid disrupts the tear pump. This targeted assessment pinpoints which part of the system is failing so treatment fits the cause.

When irritation and reflex tearing are the cause, treatment targets the surface: artificial tears and lubricating ointment, warm compresses and lid hygiene for blepharitis, allergy drops, and removing any offending lash. Paradoxically, treating dry eye well often stops the watering.

When drainage is the problem, options depend on the blockage. Narrowed puncta can be opened with a minor in-office procedure. A blocked nasolacrimal duct causing bothersome tearing or infection is typically treated with a surgery called dacryocystorhinostomy (DCR), which creates a new drainage pathway into the nose; a tear-sac infection is treated with antibiotics first. Lid-position problems such as ectropion are corrected surgically to restore the tear pump. Because these treatments differ so much, the first step is identifying the mechanism.

• Do not assume watery eyes mean your eyes are "too wet" and skip lubrication — dryness is a leading cause of overflow.
• Do not repeatedly wipe or rub the eye downward, which can pull the lower lid out of position over time.
• Do not use old or leftover prescription drops to "dry up" tears without a diagnosis.
• Do not ignore a tender, swollen, red lump at the inner corner — it can be an infection needing prompt antibiotics.
• Do not delay evaluation of tearing that follows injury or a chemical splash, or comes with pain or vision change.

Call May Eye Care Center if your eyes water constantly, especially with discharge, a scratchy sensation, or blurring, and we can determine whether the cause is surface irritation, poor drainage, or a lid problem — and treat it accordingly. Seek urgent care for a red, painful, swollen inner-corner lump with fever, or for tearing after trauma or a chemical splash. Patients throughout the Hanover area are welcome to schedule an evaluation.

Constant watering comes either from tears that cannot drain or from an irritated surface making too many reflex tears — often dry eye. Identifying which one is at fault is what makes treatment work.