A bubble in your eye usually means one of two things: a small fluid-filled blister on the surface of the eyeball itself, or a cluster of mucus in the corner of your eye. The first is called a conjunctival cyst, and it is generally harmless. The second is just eye discharge that has gathered, often after sleep. Neither is typically a medical emergency, but understanding which one you have helps you decide if you need to see a doctor.
What Is the Bubble on the White of My Eye?
If the bubble sits directly on the white part of your eyeball, it is most likely a conjunctival cyst. The conjunctiva is the thin, clear membrane that covers the white of your eye and the inside of your eyelids. Sometimes a small pocket of fluid forms within this membrane. It looks like a tiny, clear blister.
These cysts are usually benign. They can form when the conjunctiva folds over itself or when a small duct becomes blocked. They often appear suddenly. You may notice it when you look in the mirror or when you feel a slight foreign body sensation, like something is in your eye. Most of the time, they cause no pain and do not affect your vision.
Another common cause is a pinguecula. This is a yellowish bump on the white of the eye, usually near the nose side. It is not a fluid-filled bubble. It is a deposit of protein, fat, or calcium. Pingueculae are caused by long-term exposure to UV light, wind, and dust. They are very common in people who spend a lot of time outdoors.
Why Do I Have A Bubble In My Eye After Sleeping?
A bubble in the corner of your eye after sleep is almost always mucus. Your eyes produce mucus throughout the night. When you sleep, your eyelids are closed, and this mucus collects in the inner corner of your eye. It can look like a clear or slightly white bubble.
This is completely normal. The medical term for this collection is rheum, though most people call it eye crust or sleep in your eyes. It is a combination of mucus, oil, dead skin cells, and dust that your eyes trap while you sleep. You can simply wipe it away with a clean tissue or wash your face in the morning.
If you notice an excessive amount of mucus, especially if it is thick, yellow, or green, this could indicate an eye infection like conjunctivitis. If your eye is also red, itchy, or painful, you should see a doctor.
Can a Bubble in the Eye Be Serious?
Most bubbles and cysts on the eye surface are not serious. A conjunctival cyst is typically harmless and may resolve on its own within a few days or weeks. A mucus bubble after sleep is simply discharge and is not a concern.
However, there are situations where you should seek medical attention. See a doctor if the bubble is accompanied by any of the following:
- Eye pain or discomfort that does not go away
- Redness or inflammation around the bubble
- Blurred vision or changes in your vision
- Sensitivity to light
- Excessive tearing
- The bubble grows in size
- You have had recent eye surgery or an eye injury
These symptoms could indicate an infection, inflammation, or another condition that requires treatment. A doctor can examine your eye with a slit lamp, which is a special microscope used to look at the eye in detail. This examination will quickly tell them what the bubble is.
How Is a Conjunctival Cyst Treated?
If the cyst is small and not causing symptoms, most doctors recommend leaving it alone. Many cysts disappear on their own without any treatment. You can use artificial tears or lubricating eye drops to keep the eye comfortable and reduce any irritation.
If the cyst is large, painful, or affects your vision, a doctor may need to drain it. This is a simple office procedure. The doctor numbs your eye with drops and uses a small needle to puncture and drain the cyst. This provides immediate relief.
There is a chance the cyst will return after draining. In some cases, a doctor may recommend surgical removal. This is usually reserved for cysts that keep coming back or cause persistent symptoms. The surgery is minor and is typically done in an outpatient setting.
It is important not to try to pop or drain the bubble yourself. Your fingers and nails carry bacteria. Poking at your eye can introduce an infection or scratch the cornea. Leave any procedure to a medical professional.
What Causes a Bubble in the Eye?
Several factors can lead to a conjunctival cyst. The most common cause is minor trauma to the eye. This could be from rubbing your eye too hard, from a small scratch, or from contact lens irritation. When the conjunctiva is disturbed, it can fold and trap fluid.
Allergies can also contribute. When your eyes are itchy and you rub them frequently, you increase the risk of creating a cyst. Chronic eye inflammation from conditions like dry eye syndrome can also make the conjunctiva more fragile and prone to cyst formation.
Some research suggests that a specific type of cyst, called a conjunctivochalasis, is related to age. As you get older, the conjunctiva can become looser and form folds that trap tears. This is more common in older adults and can cause a sensation of having something in your eye.
Frequently Asked Questions
Is a bubble in my eye an emergency?
No, a bubble in your eye is rarely an emergency. However, seek immediate care if you have severe pain, sudden vision loss, or the bubble appeared after an injury.
Can I pop the bubble on my eye at home?
No, you should never pop a bubble on your eye at home. Doing so can introduce bacteria and cause a serious infection or scratch your cornea.
How long does a conjunctival cyst last?
Most conjunctival cysts resolve on their own within a few days to a few weeks. If it persists longer than a month or grows larger, see an eye doctor.
Will a bubble in my eye go away by itself?
Yes, most small conjunctival cysts and mucus bubbles will go away on their own. Lubricating eye drops can help keep the eye comfortable while it heals.
Seeing a bubble in your eye can be alarming, but the vast majority of cases are harmless and temporary. Pay attention to your symptoms. If the bubble is painless and your vision is clear, it is likely a benign cyst or simple mucus. If you have any pain, redness, or vision changes, contact an eye care professional for a proper diagnosis.
