October 17, 2025
Common Causes of Red Eyes

Red eyes can be an indication of various eye conditions, ranging from minor irritations to more serious issues. Understanding the potential causes, symptoms, and available treatments is beneficial for managing this condition. Here is more information on red eyes and when it is appropriate to seek professional medical advice:

What Are Red Eyes?

Red eyes occur when the small blood vessels on the surface of the eye, specifically on the sclera (the white part), become swollen and dilated. This dilation makes them more visible, giving the eyes a pink or reddish appearance. This condition, medically known as conjunctival hyperemia, can affect one or both eyes.

The conjunctiva is a thin, transparent membrane that covers the sclera and lines the inside of the eyelids. When this membrane becomes inflamed or irritated, the blood vessels within it expand. This is a common response to allergens, infections, or injuries.

What Are the Common Causes?

Several factors can lead to the development of this condition. Environmental irritants such as dust, pollen, pet dander, and smoke are frequent culprits. These allergens can trigger an allergic reaction, leading to inflammation and redness.

Infections are another primary cause. Conditions like conjunctivitis, commonly known as pink eye, may be caused by viruses or bacteria. Other issues, such as dry eye syndrome, where the eyes do not produce enough tears, or blepharitis, an inflammation of the eyelids, can also result in redness. 

Other contributing factors include digital eye strain from prolonged screen use, contact lens wear, and exposure to chemical irritants like chlorine in swimming pools. Red eyes may also signal underlying medical conditions, such as glaucoma or autoimmune disorders. Consulting an ophthalmologist helps determine the cause of this condition and provides treatment options.

What Are the Symptoms?

The primary symptom is the visible redness of the sclera. This can be accompanied by a range of other symptoms, which vary depending on the underlying cause. It is common to experience itching, burning, or a gritty sensation, as if something is in the eye.

Additional symptoms include excessive tearing or a watery discharge. If an infection is present, a thick, yellow, or green discharge may form, sometimes causing the eyelids to stick together. Blurred vision, sensitivity to light (photophobia), and pain can also occur with red eyes.

What Are the Treatment Options?

Treatment is directed at the specific cause of the condition. A medical professional can determine the appropriate course of action after an evaluation. Some treatment options include:

  • Antibiotic drops
  • Cool compresses
  • Artificial tears
  • Anti-inflammatory drops
  • Allergy drops
  • Punctal plugs
  • Eyelid scrubs

In some situations, stopping or changing certain eye drops that may be causing irritation is necessary. For structural issues affecting the eyelids, eyelid surgery may be recommended as a more permanent solution.

When Should You Seek Help?

While many cases are mild and resolve on their own or with simple treatments, some situations require medical attention. You should contact a healthcare provider if your red eyes are accompanied by severe pain, significant changes in vision, or a high sensitivity to light. A thick discharge from the eye, a fever, or symptoms that worsen or do not improve after a few days also warrant a medical evaluation.

Consult an Ophthalmologist Today

Red eyes can be a symptom of various conditions, from minor irritations to more serious health issues. Identifying the cause is the first step toward effective management. If you are experiencing persistent or severe symptoms, consult a healthcare professional today.

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