Conjunctivitis (Pink Eye) Blood Test

What is Conjunctivitis?

Conjunctivitis, commonly known as pink eye, is an inflammation of the conjunctiva, the thin clear tissue covering the white part of the eye and inner eyelids. It is caused by viral or bacterial infections, allergens like pollen and animal dander, or nutritional deficiencies such as low biotin levels. The Biotin (Vitamin B7) test is the most important nutritional test for conjunctivitis because it identifies deficiencies that contribute to chronic eye inflammation.

RECOMMENDED TEST Biotin (Vitamin B7)
Google reviews 505 reviews
$545 $425
What's included
Fast & easy, results by email & SMS
No extra fees paid at the lab
No need to visit a doctor
Private & confidential
No insurance needed
Results explained
Why Private MD Labs?
90-day money-back guarantee Lab order in minutes Save a trip to the doctor Low prices since 2005 Labs within 2 miles

What causes conjunctivitis?

Conjunctivitis is caused by viral infections like adenovirus, bacterial infections such as Staphylococcus aureus or Streptococcus pneumoniae, allergens including pollen, pet dander, dust mites, and mold, or nutritional deficiencies like low biotin levels. Contact with contaminated hands, towels, or eye makeup can spread infectious pink eye, while allergic conjunctivitis occurs when your immune system overreacts to environmental triggers. Chemical irritants like chlorine in swimming pools or air pollution can also inflame the conjunctiva and cause pink eye symptoms.

What is the best test for conjunctivitis?

The Biotin (Vitamin B7) test is the most important nutritional test for conjunctivitis because biotin deficiency directly contributes to eye inflammation and irritation. This blood test measures your biotin levels to determine if supplementation could reduce chronic pink eye episodes. For allergic conjunctivitis, the Bermuda Grass (g2) IgE test is essential because it detects specific antibodies to one of the most common seasonal allergens triggering eye inflammation. The Respiratory Allergy Profile provides comprehensive screening for multiple environmental triggers including tree pollen, grasses, and mold that cause allergic pink eye, helping you identify and avoid specific allergens.

When should I get tested for conjunctivitis?

You should get tested if you experience recurring pink eye episodes more than twice a year, have persistent eye redness and irritation that does not improve with over-the-counter treatments, notice your symptoms worsen during specific seasons or after exposure to certain environments, or if you have unexplained eye inflammation alongside other health issues. Testing is especially important if you work in environments with chemical exposure, have chronic allergies, or experience eye symptoms that interfere with your daily activities and quality of life.

What are the symptoms of conjunctivitis?
Conjunctivitis symptoms include redness in the white part of one or both eyes, increased tear production and watery discharge, thick yellow or green discharge that crusts over eyelashes, itching or burning sensation in the eyes, feeling like something is stuck in your eye, and sensitivity to light. You might notice your eyes are matted shut when you wake up in the morning, experience blurred vision, or have swollen eyelids. Allergic conjunctivitis typically causes intense itching and watery discharge, while bacterial pink eye produces thick, sticky discharge.
Who is at risk for conjunctivitis?
People at higher risk for conjunctivitis include children in daycare or school settings where infections spread easily, individuals who wear contact lenses without proper hygiene, those with seasonal allergies or asthma, people who work in healthcare or chemical manufacturing environments, and anyone with a weakened immune system. You are also at increased risk if you frequently touch your eyes with unwashed hands, share personal items like towels or eye makeup, have nutritional deficiencies including low biotin levels, or are exposed to someone with infectious pink eye.
What happens if conjunctivitis is left untreated?
Untreated conjunctivitis can lead to complications including corneal inflammation or ulceration that causes permanent vision damage, chronic inflammation that makes your eyes more susceptible to future infections, spread of bacterial infections to other parts of the eye, and development of scarring on the conjunctiva or cornea. Severe cases can cause keratitis, an infection of the cornea that threatens vision. Chronic allergic conjunctivitis that goes unmanaged can significantly impact your quality of life, causing constant discomfort, sleep disruption, and reduced productivity at work or school.
Can conjunctivitis be diagnosed with a blood test?
Conjunctivitis itself is diagnosed through visual examination by a healthcare provider who looks at your eye symptoms and discharge. However, blood tests are essential for identifying underlying causes of recurring pink eye, including allergen-specific IgE tests that detect which environmental triggers are causing allergic conjunctivitis, and nutritional testing like the Biotin test that reveals deficiencies contributing to chronic eye inflammation. These blood tests help create a targeted treatment plan and prevent future episodes by addressing root causes rather than just treating symptoms.
How is conjunctivitis treated?
Conjunctivitis treatment depends on the cause. Bacterial pink eye is treated with antibiotic eye drops or ointments prescribed by a doctor. Viral conjunctivitis usually resolves on its own within one to two weeks with supportive care like cool compresses and artificial tears. Allergic conjunctivitis is managed with antihistamine eye drops, oral allergy medications, and avoiding identified allergens based on blood test results. If biotin deficiency is detected through blood testing, supplementation can reduce chronic eye inflammation. Treatment also includes proper eye hygiene, avoiding contact lenses during infection, and not sharing personal items.
How can I prevent conjunctivitis?
Prevent conjunctivitis by washing your hands frequently with soap and water, especially before touching your eyes or face, avoiding sharing towels, washcloths, or eye makeup with others, replacing eye cosmetics every three months, and properly cleaning and storing contact lenses. If you have allergies, get tested to identify your specific triggers so you can avoid them, keep windows closed during high pollen seasons, use air purifiers indoors, and wash bedding weekly in hot water. Maintain good nutrition including adequate biotin intake to support eye health and reduce inflammation susceptibility.
What can I do at home for conjunctivitis?
At home, apply cool compresses to your closed eyes several times daily to reduce swelling and discomfort, use preservative-free artificial tears to flush out irritants and keep eyes moist, gently clean crusty discharge from eyelids with a warm washcloth, and avoid wearing contact lenses until symptoms completely resolve. Do not use old eye drops or share medications with others. Keep your hands clean and resist rubbing your eyes. For allergic conjunctivitis, stay indoors during high pollen counts, use air conditioning instead of open windows, and shower before bed to remove allergens from hair and skin. Consider taking biotin supplements if testing reveals a deficiency.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Testosterone 375 ng/dL
Demo results
Normal Optimal 400 - 1000 High
375 ng/dL

What this means

Your testosterone levels are slightly below the optimal range. While this is not necessarily cause for concern, it may contribute to occasional fatigue, reduced motivation, or lower muscle mass over time.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.

Us vs. Them

Not overhyped or overpriced. Just comprehensive blood testing made simple and for everyone.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.

1,000,000+ blood tests later, here's what our customers say

Google reviews 505 reviews Next
Biotin (Vitamin B7)
Google reviews 505 reviews
$545 $425
What's included
Fast & easy, results by email & SMS
No need to visit a doctor
Private & confidential
No insurance needed
Results explained
No extra fees paid at the lab

Sample results

Sample image
For you & your coach Health insights Written in human language, backed by science.
Sample image
For you & your doc Classic lab report A familiar and comprehensive lab report.

Ask AI

Your 24/7 Lab Guide

Quick questions:

Which test is right for my symptoms?
What could be causing this?
When should I get tested?
A
Hi, I'm AI. I can help you find the right test, explain results, or prepare for your visit. What can I help with?
Just now
A
AI provides insights, not medical diagnoses.