Frequent Watery Eyes May Not Be an Allergy
Common Causes of Watery Eyes
Dust Allergy and Allergic Eye Disease
Allergic eye symptoms usually occur when the body reacts to allergens such as:
๐ Dust
๐ Smoke
๐ Pollen
๐ Dust mites
Common symptoms include:
๐ Itchy eyes
๐ Burning or irritated eyes
๐ Watery eyes
๐ Redness
The symptoms often affect both eyes at the same time. Some people may also experience nasal symptoms such as a blocked nose, sneezing, or difficulty breathing through the nose.
Nasolacrimal Duct Obstruction
A nasolacrimal duct obstruction occurs when the tear duct that normally drains tears from the eyes into the nasal cavity becomes blocked.
When tears cannot drain properly, they may build up and overflow continuously. This excessive tearing is unrelated to sadness and can occur in both infants and adults.
Differences Between Allergies and a Blocked Tear Duct
Eye Symptoms
Dust allergy or allergic eye disease
๐ Watery eyes accompanied by itching
๐ Red eyes
๐ Burning or irritation
๐ Symptoms often affect both eyes
Blocked tear duct
๐ Continuous tearing
๐ Symptoms may affect one eye or both eyes
๐ Redness may occur in some cases
๐ Sticky eye discharge may be present
๐ Crusting or pus may develop
๐ A lump or swelling may appear near the inner corner of the eye
๐ Infection may lead to inflammation of the tear sac
Pattern of Symptoms
Allergies
๐ Symptoms usually come and go depending on exposure to allergens.
Blocked tear duct
๐ Tearing may continue throughout the day.
๐ The condition may not improve on its own.
๐ Repeated infections may occur.
Cause
Allergies
๐ Usually caused by exposure to allergens such as dust, smoke, pollen, or dust mites.
Blocked tear duct
๐ Caused by narrowing, obstruction, or scar tissue within the tear drainage system.
Causes and Risk Factors for Blocked Tear Ducts
In Newborn Babies
Blocked tear ducts in infants are commonly caused by a thin membrane covering Hasner’s valve, located at the lower end of the tear duct before it opens into the nasal cavity.
This condition is found in approximately 5–10% of newborns and is generally not considered severe. The membrane may open naturally as the baby grows.
Most cases improve within the first year of life. However, when symptoms continue, additional treatment may be required, such as tear-duct massage or a medical procedure to open the drainage passage.
In Adults
Blocked tear ducts in adults may be associated with several factors.
๐ Chronic inflammation: Long-term inflammation of the tear duct or surrounding tissues may cause thickening and narrowing.
๐ Facial or nasal injury: A broken nose, facial trauma, or scar tissue may compress or block the tear drainage pathway.
๐ Abnormalities inside the nasal cavity: A nasal tumour or deviated nasal septum may interfere with normal tear drainage.
๐ Increasing age: Age-related tissue changes may reduce the elasticity of the tear ducts and lead to narrowing.
๐ Previous facial surgery or radiotherapy: Surgery or radiation treatment around the face may cause scarring and obstruction.
Who Is at Risk of a Blocked Tear Duct?
People with a greater risk include:
๐ Newborn babies whose tear drainage system has not fully developed
๐ Adults and older people with repeated infections around the eyes or inner corners of the eyes
๐ People with chronic inflammation of the tear ducts
๐ People who have experienced an injury near the nose, face, or inner corner of the eye
๐ People with a tumour near the inner eye or nasal cavity
๐ People with chronic inflammation of the tear sac
Care and Treatment
For Dust Allergy and Allergic Eye Disease
Helpful measures include:
๐ Avoiding allergens such as dust and dust mites
๐ Keeping the home and bedding clean
๐ Avoiding rubbing the eyes
๐ Using eye drops or antihistamine medication as recommended by a doctor
For Blocked Tear Ducts in Children
A doctor may recommend tear-duct massage to help open the blockage and improve drainage.
Parents should receive instructions on the correct massage technique because inappropriate pressure may cause irritation or injury.
For Adults or Chronic Obstruction
Treatment may include:
๐ Dilating or probing the tear duct
๐ Inserting a small tube to maintain the drainage passage
๐ Surgery to create a new tear drainage pathway
One surgical option is dacryocystorhinostomy, or DCR, which may be performed using an endoscopic technique through the nasal cavity without leaving an external facial scar.
When Should You See a Doctor?
Consult an ophthalmologist if you experience:
๐ Continuous or recurring watery eyes
๐ Sticky or pus-like discharge
๐ Pain or swelling near the inner corner of the eye
๐ Redness accompanied by fever
๐ Repeated eye infections
๐ Blurred vision
๐ Symptoms that do not improve with allergy treatment
Summary
Frequent watery eyes can have several causes. Allergic eye disease usually causes itching, redness, and tearing, often affecting both eyes and appearing after exposure to allergens.
A blocked tear duct more commonly causes continuous tearing, sometimes affecting only one eye, and may be accompanied by sticky discharge, swelling, or repeated infection.
Because treatment differs depending on the cause, persistent watery eyes should be assessed by an eye specialist to ensure an accurate diagnosis and appropriate treatment.
Reference :
Independent Writer
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