Styes - Causes, Treatment & When to See a Doctor

What is Styes?

A stye, also known as a hordeolum, is a common bacterial infection that affects the eyelid. It occurs when oil glands around the eyelashes or within the eyelid become blocked and infected. Styes typically appear as small, red, painful lumps along the edge of the eyelid or in the conjunctiva (the inner lining of the eyelid and outer surface of the eye). They can be either external (on the outer eyelid) or internal (inside the eyelid), but both types are usually caused by similar bacteria.

Styes are generally harmless and often resolve on their own within a few days. However, they can be uncomfortable and may lead to complications if left untreated. Common risk factors include poor hygiene, recurrent blepharitis (inflammation of the eyelids), or the use of contaminated contact lenses.

According to the Mayo Clinic, styes are most common in children and adults aged 30 to 50, but they can affect anyone. While not serious, prolonged inflammation or secondary infections may require medical attention.

Common Causes

Styes are primarily caused by bacterial infections, with the most frequent culprit being Staphylococcus aureus. Other contributing factors include:

• Poor eyelid hygiene: Not cleaning the eyelids regularly can allow dirt and bacteria to accumulate.
• Using contaminated makeup: Eyeliner or mascara that is not properly cleaned or shared can introduce bacteria.
• Contact lenses: Improper contact lens care or wearing contacts for too long increases infection risk.
• Rosacea: This chronic skin condition often affects the eyelids and can lead to styes.
• Allergies: Pollen, dust, or pet dander can irritate the eyes and block oil glands.
• Eye injuries: Even minor trauma to the eyelid can introduce bacteria.
• Age-related factors: As people age, oil glands may become less efficient, increasing susceptibility.
• Weakened immune system: Conditions like diabetes or HIV can make infections more likely.
• Blepharitis: A chronic inflammation of the eyelids that often leads to recurrent styes.
• Viruses: Less commonly, viruses like herpes simplex can cause similar symptoms.

As noted by the Centers for Disease Control and Prevention (CDC), improper hygiene is a major preventable cause of styes.

Associated Symptoms

While styes are usually localized, they can cause a range of symptoms depending on their location and severity. Common signs include:

• Redness: The affected eyelid appears bright red or swollen.
• Pain or tenderness: The stye is often painful when pressed or rubbed.
• Swelling: Fluid buildup causes the eyelid to bulge.
• Excessive tearing: The eye may water excessively to combat irritation.
• Crusting or discharge: Pus or a sticky film may appear on the eyelid or lashes.
• Light sensitivity: Bright lights may feel uncomfortable or painful.
• A lump or pimple: A noticeable bump or boil-like lesion on the eyelid.

Internal styes may cause more severe discomfort and may be harder to treat due to their location inside the eyelid. The NHS UK advises that symptoms usually peak within 24 to 48 hours and then begin to improve.

When to See a Doctor

Most styes do not require medical intervention and heal within a week. However, you should consult a healthcare provider if:

• Pain or swelling worsens after the first few days.
• You experience changes in vision, such as blurry sight or eye discomfort near the affected eye.
• The stye does not improve after two weeks.
• You develop a fever or systemic symptoms like fatigue.
• The stye recurs frequently or in both eyes.
• You have diabetes or a weakened immune system.

According to the Cleveland Clinic, recurrent styes may indicate an underlying condition like blepharitis or a skin disorder that requires treatment.

Diagnosis

Diagnosing a stye is typically straightforward and involves a physical examination by a healthcare provider. The doctor will examine the eyelid for signs of redness, swelling, or pus. In some cases, they may also:

• culture a sample: To identify the specific bacteria causing the infection.
• rule out other conditions: Such as conjunctivitis (pink eye) or orbital cellulitis (a severe infection of the eye socket).

If complications arise, such as vision changes or severe pain, imaging tests like an ultrasound or MRI might be recommended to check for deeper infections.

Treatment Options

Most styes can be treated effectively at home, but medical treatment may be necessary for severe cases. Here are the common approaches:

Home Remedies

• Apply warm compresses: Soak a clean cloth in warm water and apply it to the affected eye for 10–15 minutes several times a day. This helps unblock glands and reduce swelling.
• Gentle eyelid cleaning: Use a mild, fragrance-free soap or baby shampoo to clean the eyelids and remove debris.
• Avoid popping the stye: Resist the urge to squeeze or pop the bump, as this can spread infection.
• Remove contact lenses: Temporarily discontinue lens use until the infection clears.
• Wear an eye patch: At night, to protect the eye and promote healing.

Medical Treatments

• Topical antibiotics: Ointments or drops containing antibiotics (e.g., bacitracin or erythromycin) may be prescribed to eradicate the bacteria.
• Oral antibiotics: For large or recurrent styes, systemic antibiotics like doxycycline or ciprofloxacin might be necessary.
• Steroid injections: If there’s significant inflammation, a doctor may inject corticosteroids to reduce swelling.
• Surgical drainage: In rare cases, a stye that becomes an abscess may need to be drained surgically.

According to the World Health Organization (WHO), treatment should always address the underlying cause, such as diabetes management or improved contact lens hygiene.

Prevention Tips

Preventing styes involves good hygiene and proactive eye care. Here’s how:

• Wash hands frequently: Before touching your face or applying makeup.
• Replace makeup regularly: Discard old eyeliner, mascara, or eye shadow every 3–6 months.
• Clean contact lenses properly: Follow the manufacturer’s guidelines and avoid overnight wear.
• Avoid sharing eye products: Never share eye drops, makeup, or towels.
• Manage underlying conditions: Treat blepharitis, rosacea, or diabetes to reduce risk.
• Use hypoallergenic products: To minimize irritation from skincare or makeup.
• Protect your eyes: Wear sunglasses to shield against dust and allergens.

As emphasized by the Mayo Clinic, consistent hygiene is the most effective way to prevent styes and related infections.

Emergency Warning Signs

While rare, some styes can lead to serious complications. Seek immediate medical help if you notice any of the following:

These symptoms could indicate a spreading infection, such as cellulitis or orbital abscess, which require urgent treatment to prevent blindness or systemic illness.