What are the causes and treatments for conjunctivitis?

Symptom Database

Conjunctivitis, commonly known as pink eye, is an eye infection that causes redness and inflammation of the conjunctiva, the thin clear tissue that lines the inside of the eyelid and covers the white part of the eye. It can be caused by various factors, including viruses, bacteria, allergies, and irritants. In this article, we will explore the causes and treatments for conjunctivitis, as well as home remedies and tips to alleviate the symptoms.

Symptoms of Conjunctivitis

Before delving into the causes and treatments, it is important to understand the symptoms associated with conjunctivitis. The most common symptoms include:

  • Redness in the white part of the eye
  • Itchy or irritated eyes
  • Excessive tearing
  • A gritty or sandy feeling in the eyes
  • Crusty eyelids or discharge
  • Sensitivity to light

If you experience any of these symptoms, it is crucial to seek medical attention to determine the cause and appropriate treatment.

Causes of Conjunctivitis

Conjunctivitis can be caused by various factors, including:

Viral Conjunctivitis

Viral conjunctivitis is highly contagious and is often associated with the common cold or respiratory infections. It is caused by a virus, such as adenovirus, and can easily spread through direct contact with infected individuals or contaminated surfaces.

Bacterial Conjunctivitis

Bacterial conjunctivitis is caused by bacteria, such as Staphylococcus aureus or Streptococcus pneumoniae. It can occur as a secondary infection to a respiratory or ear infection, or due to poor hygiene practices, such as touching the eyes with unwashed hands.

Allergic Conjunctivitis

Allergic conjunctivitis is triggered by allergens, such as pollen, dust mites, or pet dander. It is not contagious and often affects individuals with a history of allergies or asthma. Symptoms may be seasonal or occur year-round.

Irritant Conjunctivitis

Irritant conjunctivitis is caused by exposure to irritants, such as smoke, chemicals, or foreign objects. It can also result from contact lens wear or improper use of eye drops.

Treatment for Conjunctivitis

The treatment for conjunctivitis depends on the underlying cause. Here are some common treatment options:

Viral Conjunctivitis

Since viral conjunctivitis is caused by a virus, antibiotics are ineffective. The infection typically resolves on its own within one to two weeks. In the meantime, applying warm compresses to the eyes and using over-the-counter lubricating eye drops can help alleviate symptoms.

Bacterial Conjunctivitis

Bacterial conjunctivitis is usually treated with antibiotic eye drops or ointments. It is important to complete the full course of medication as prescribed by a healthcare professional to ensure the infection is fully eradicated.

Allergic Conjunctivitis

Treating allergic conjunctivitis involves identifying and avoiding the allergen triggers. Over-the-counter antihistamine eye drops or oral antihistamines can provide relief from symptoms. In severe cases, a healthcare professional may prescribe stronger medications, such as corticosteroid eye drops.

Irritant Conjunctivitis

Irritant conjunctivitis can be relieved by flushing the eyes with clean water or saline solution to remove the irritant. Artificial tears or lubricating eye drops can help soothe the eyes. If the symptoms persist or worsen, it is advisable to consult a healthcare professional.

Home Remedies for Conjunctivitis

In addition to medical treatments, there are several home remedies that can help alleviate the symptoms of conjunctivitis:

  • Apply a cold compress to reduce inflammation and soothe the eyes.
  • Cleanse the eyelids with a warm, damp cloth to remove crusts or discharge.
  • Avoid wearing contact lenses until the infection clears up.
  • Wash hands frequently and avoid touching or rubbing the eyes.
  • Change pillowcases and towels regularly to prevent reinfection.
  • Avoid sharing personal items, such as towels or eye makeup, with others.

It is important to note that while home remedies can provide temporary relief, they do not substitute medical treatment. If the symptoms persist or worsen, it is essential to consult a healthcare professional for proper diagnosis and treatment.

In conclusion, conjunctivitis, or pink eye, is a common eye infection that can be caused by viruses, bacteria, allergies, or irritants. The symptoms include redness, itching, tearing, and discharge. The treatment options vary depending on the underlying cause, ranging from antibiotic medications for bacterial conjunctivitis to avoiding allergens for allergic conjunctivitis. Home remedies, such as cold compresses and proper hygiene practices, can help alleviate symptoms. If you suspect you have conjunctivitis, it is important to seek medical attention for a proper diagnosis and appropriate treatment.

Haroon Rashid, MD
Rate author
Urgent Care Center of Arlington, VA