Reasons for Swollen Eyes: Causes, Symptoms, Treatment, and Prevention

Medically Reviewed

Written by Pooja Rawat, Medical Content Writer

There might be some mornings when you wake up with puffy eyes, and it’s kind of unsettling, especially when you cannot pinpoint an obvious reason.

So, if you ask for “reasons for red, swollen eyes”, here are the common causes:

• Allergies
• Fluid accumulation
• Irritation
• Poor sleep quality
• Eyelid inflammation
• Styes
• Conjunctivitis
• Injuries and other medical conditions

Also Read : Eye Flu Home Remedies: Natural Tips for Relief and Faster Recovery

Sometimes your eye can appear swollen “for no reason at all” because the trigger can be subtle, such as an overnight allergy or temporary retention of fluid.

It is important to understand that you have to look at the other symptoms as well. 

For example: An itchy, watery eye can indicate an allergy. A painful, red, hot eyelid may point towards infection. Sudden unexplained swelling followed by vision changes requires more urgent attention. 

Also Read: 10 Essential Eye Care Tips During the Monsoon Season

The treatment of swollen eyes will depend on the underlying cause; hence, only follow your doctor’s advice.

Quick Overview: Common Reasons for Swollen Eyes

Read the below table to have an quick idea about a possible reason for swollen eye.

Note: Do not solely look at swelling; consider noticing the symptoms that follow it.

Common Reasons for Swollen Eyes

If you ask “Why Are My Eyes Swollen in the Morning?”

Overnight, fluid can accumulate in the tissues around the eyes. This can make them look puffier when you wake up in the morning. 

Temporary puffiness can also be more noticeable if you have had poor sleep, or you were crying, or were exposed to an irritant or allergen.

Also Read: Eye Stye(Sty) Explained: Causes, Symptoms, And How To Treat Them

The following are the common reasons for swollen eyes:

1. Allergies

Allergens such as pollen, dust mites, mould, animal dander, certain foods, insect bites, and some products can trigger an allergic response.

The common symptoms of allergic eyes are:

• Itchy eyes
• Redness
• Watering
• Puffy eyelids
• Sneezing or a runny nose

If both eyes appear puffy and itchy after exposure to something specific, this can indicate that an allergy is more likely.

The treatment generally involves avoiding the triggers, cold compresses, artificial tears, and medicated eye drops after a doctor’s prescription.

2. Blepharitis (Inflammation of the Eyelid)

Blepharitis is a term for inflammation, which can lead to an infection in your eye, accompanied by sore or swollen eyelids, itching, a gritty feeling, and crusts around the eyelashes.

Regular eyelid hygiene and warm compresses can help; however, persistent or worsening symptoms need proper evaluation.

If you believe you have blepharitis, try these tips:

• Avoid eye makeup
• Use warm compresses
• Get some omega-3s
• Lid scrubs, available over the counter as a spray, foam, or individually wrapped towelettes, often containing hypochlorous acid

3. Stye or Chalazion

A stye (hordeolum) is caused by a bacterial infection in an oil gland or eyelash follicle. A stye is very painful.

A chalazion is another type of eyelid lump linked to a blocked oil gland and is caused by a clogged oil gland without an active infection.

A chalazion can form due to a stye, but they’re different conditions.

For a stye or chalazion, a clean warm compress can help. It is recommended to apply a warm compress to a closed eyelid for around 10–15 minutes, 4 times daily.

Other treatments that doctors can recommend for a stye include:

• Draining
• Antibiotics
• A steroid injection

4. Conjunctivitis (Pink Eye) & Other Eye Infections

Conjunctivitis (pink eye) is inflammation in your eyes, which happens when the membrane that covers the white part of your eye gets irritated.

Viral and bacterial infections are the most common causes. You might not even need treatment. But visit your doctor if the symptoms are getting worse after a few days.

 Treatment depends on the cause. Antibiotics are not appropriate for every red or swollen eye.

5. Injury or Bruising

If you are wondering, “My eye is bruised and swollen for no reason,” just think if there could have been a minor injury that you didn’t notice. 

Reasons for swelling and bruising around the eye can be a bump, fall, sports accident, cosmetic procedure, or contact with an object.

An eye injury can be very painful and can cause permanent vision loss, whether or not it appears severe. Contact your doctor right away if you have an eye injury.

6. Dust, Cosmetics, Chemicals & Other Particles

Dust, cosmetics, chemicals, and other particles can irritate the eye. 

If something gets into the eye, the first step to relief is not to rub the eye. Then gently rinse it with clean water or saline and blink gently. 

Chemical exposure or an object entering the eye during cutting, drilling or grinding demands urgent medical attention.

7. Other Medical Conditions

Less common causes include:

• skin conditions such as eczema or dermatitis, inflammatory eye diseases, 
• thyroid-related eye disease, 
• and infections involving tissues around the eye.

Also Read: Symblepharon Explained: Causes, Variants & How It’s Treated

For example, Graves’ disease can lead to bulging or swollen eyes and double vision. 

Follow your doctor’s advice and complete the course of treatment. Book an appointment