You may have conjunctivitis, also called pink eye, if you have ever woken up with red, itchy eyes and a scratchy, uncomfortable feeling. It can be painful and contagious, one of the most common reasons people go to urgent care.
There are various forms of pink eye, each with its causes, symptoms, and course of treatment; thus, no two cases are the same.
What Are the Main Types of Conjunctivitis
The U.S. Centers for Disease Control and Prevention (CDC) explains that viruses, bacteria, allergens, use of contact lenses, chemicals, fungi, and certain diseases cause conjunctivitis.
There are three main types of conjunctivitis: Viral, Bacterial, and Allergic Pink Eye.
- Viral Conjunctivitis
Viral conjunctivitis is the most common type of pink eye and is also highly contagious. It’s usually caused by adenovirus, which spreads easily through coughs, sneezes, or touching your eyes with unwashed hands.
You can also catch it using contaminated items like towels, pillowcases, or even while swimming in a pool where the virus is present. Often, viral pink eye shows up alongside a cold, the flu, or another upper respiratory infection.
While adenoviruses are the most common culprits, as Medical News Today reported, other viruses can cause more serious forms of pink eye.
- Bacterial Conjunctivitis
Bacterial conjunctivitis happens when bacteria infect the thin, clear layer that covers the white part of your eye and the inside of your eyelid (called the conjunctiva). It’s especially common in young children, older adults, contact lens wearers, and people with weakened immune systems.
In kids, bacterial pink eye is most often caused by Haemophilus influenzae, Streptococcus pneumoniae, and Moraxella catarrhalis. In adults, staphylococcal bacteria are usually to blame.
Pink eye is contagious and can spread through contact with someone infected or by touching items like towels, pillowcases, or eye makeup.
It can also spread through respiratory droplets, like a cold or flu, and sometimes results from changes in the normal bacteria living on the eye’s surface.
- Allergic Conjunctivitis
If your eyes get red, itchy, and watery during allergy season or around certain triggers, you might be dealing with allergic conjunctivitis. A virus or bacteria doesn’t cause this type of pink eye, but rather your body’s reaction to allergens.
Allergic conjunctivitis is especially common in people with other allergic conditions like hay fever, asthma, or eczema. When your immune system overreacts to something harmless, like pollen or pet dander, it causes eye inflammation.
Common triggers for allergic conjunctivitis include pollen from trees, grass, weeds, plants, dust mites, pet dander, mold spores, contact lenses, lens cleaning solutions, cosmetics, or skincare products.
What Symptoms Should You Look Out For
No matter the cause, the pink eye usually comes with some telltale signs. However, the symptoms can vary quite a bit, depending on whether the infection is viral, bacterial, or allergic. Knowing what to look for can help you determine what type of conjunctivitis you might be dealing with and whether it’s time to see the doctor.
The most common symptoms to watch for:
- Redness in one or both eyes– This is often the first noticeable sign of conjunctivitis, caused by inflammation of the blood vessels in the eye.
- Watery or thick discharge– Viral pink eye usually produces a clear, watery discharge. At the same time, bacterial infections tend to create a thicker yellow or green discharge that may cause your eyelids to stick together.
- Itching or burning– Itchy eyes are especially common with allergic conjunctivitis, but viral and bacterial forms can also cause discomfort.
- Swollen eyelids– Inflammation can make your eyelids appear puffy or sore.
- Crusting around the eyes– Often seen in bacterial conjunctivitis, especially after sleeping.
- Sensitivity to light (Photophobia)– Some people with pink eye notice increased sensitivity to bright light.
- Feeling like something is in your eye– A “foreign body sensation” can happen with conjunctivitis.
If symptoms are mild, you may be able to manage them at home. But if you experience eye pain, blurred vision, intense redness, or if symptoms don’t improve in a few days, it’s best to check in with a healthcare provider to rule out more serious conditions.
When Should You Seek Medical Care
While many cases of pink eye are mild and go away on their own, there are times when it’s important to see a healthcare provider. Knowing when to get medical help can protect your vision and prevent complications.
According to the CDC, you should see a healthcare provider if you have pink eye along with any of the following:
- Eye pain
- Sensitivity to light (photophobia)
- Blurred vision that doesn’t improve after wiping away any discharge
- Severe or worsening redness in the eye
- Symptoms that don’t improve or get worse over 24 hours
- Presence of additional infections along with pink eye
It’s especially important to seek immediate care if a newborn or immunocompromised individual shows signs of pink eye, as this can sometimes signal a serious infection that needs prompt treatment.
In most cases, providers can diagnose pink eye by examining your eyes and discussing your symptoms. Occasionally, they may take a sample of the eye discharge to determine the exact type of conjunctivitis and guide treatment.
If you’re unsure whether your symptoms require medical attention, it’s always better to play it safe, especially regarding your eyes. A quick visit to your primary or urgent care provider, like Zenith Primary & Urgent Care in Marlborough, can help you get the right treatment and peace of mind.
How is Each Type of Conjunctivitis Treated
Treatment for pink eye depends on what’s causing it, whether viral, bacterial, or allergic. While some types clear up independently, others may need medication or other forms of care. Knowing the difference is key to feeling better faster and preventing it from spreading.
Viral Conjunctivitis
There’s no specific cure for viral pink eye, as antibiotics don’t work against viruses. Most cases will clear up on their own within a week or two. In the meantime, you can ease symptoms with:
- Cool compresses
- Artificial tears (over-the-counter lubricating eye drops)
- Avoiding contact lenses until symptoms resolve
- Practicing good hygiene to avoid spreading the virus to others
If more serious viruses like herpes cause the infection, a doctor may prescribe antiviral medication.
Bacterial Conjunctivitis
Bacterial pink eye is typically treated with antibiotic eye drops or ointment, especially if the infection is moderate to severe. These help clear the infection and reduce the chance of spreading it to others.
Symptoms often start to improve within 24 to 48 hours of starting treatment. If you suspect a bacterial infection, especially if there’s thick yellow or green discharge, it’s best to see a healthcare provider for a proper diagnosis and a prescription.
Allergic Conjunctivitis
The best way to treat allergic conjunctivitis is to remove or avoid the allergen, whether pollen, dust, pet dander, or a product like makeup or contact lens solution. Treatment may also include:
- Over-the-counter or prescription antihistamine eye drops
- Oral allergy medications
- Cool compresses to reduce swelling and itching
- Lubricating drops to flush out allergens
An allergist or eye doctor can recommend stronger medications or targeted therapies if symptoms are severe or ongoing.
Bottom Line
Pink eye may be common, but that doesn’t mean it should be ignored, especially when symptoms are severe, persistent, or affecting your vision. Knowing whether you’re dealing with viral, bacterial, or allergic conjunctivitis can make all the difference regarding treatment and relief.
Zenith Primary & Urgent Care offers fast, expert care for eye injury or infections, including pink eye. Whether you need a diagnosis, prescription eye drops, or just peace of mind, our experienced providers are here to help.
Zenith Urgent Care is open daily, even on weekends, and offers extended hours to fit your schedule. Our clinic is open Monday–Friday: 8AM–7PM and Saturday–Sunday: 8AM–4PM. Walk-ins are always welcome, and no appointment is needed.
You can also book your appointment here.
