What's this test for?

This test is ideal if you're experiencing unexplained allergic reactions like itching, hives, flushing, or even fainting episodes. It measures histamine levels in your blood to help identify if your body is having an excessive allergic response or other conditions that cause histamine release. Many people use this test when they have severe allergic symptoms that haven't been explained by standard allergy testing.

What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your histamine levels mean for your allergic reactions and overall health. These notes include personalized recommendations like dietary changes to avoid histamine-rich foods, potential medication adjustments, or whether you should see an allergist for further evaluation. You'll also get the standard lab report and can track your histamine levels over time using our trends feature to see how interventions are working.

What's included in this test?

This test measures Histamine, Plasma. This test measures plasma histamine, which is a chemical your body releases during allergic reactions. Elevated histamine levels can explain symptoms like itching, flushing, hives, digestive issues, and in severe cases, fainting or shock. This measurement helps identify whether your symptoms are truly related to excessive histamine release and can also help detect certain rare conditions like gastric carcinoid tumors.

How should I prepare for this test?

You'll need to avoid taking allergy medications, antihistamines, oral corticosteroids, and substances that block H2 receptors for 24 hours before your blood draw. This includes common allergy medicines like Benadryl, Claritin, Zyrtec, and heartburn medications like Pepcid or Zantac. Taking these medications can affect your histamine levels and make your results inaccurate, so proper preparation is important for meaningful results.

Who should consider getting this test?

This test is useful for people experiencing severe or unexplained allergic symptoms like chronic hives, flushing, or episodes of fainting. It's also helpful if you have symptoms that suggest mast cell disorders or if standard allergy testing hasn't identified the cause of your reactions. People with suspected gastric carcinoid tumors may also benefit from this test.

What symptoms indicate I may need this test?

Common symptoms that suggest you might need this test include frequent or unexplained hives, persistent itching without visible rash, facial flushing or skin redness, digestive issues like vomiting or diarrhea during reactions, episodes of low blood pressure or fainting, and severe allergic reactions that don't respond well to typical allergy treatments.

How can I naturally manage histamine levels?

Following a low-histamine diet can help by avoiding aged cheeses, fermented foods, alcohol, processed meats, and certain fish. Fresh foods are generally lower in histamine than leftovers or aged items. Managing stress through relaxation techniques, getting adequate sleep, and supporting gut health with probiotics may also help regulate histamine response. Some people find natural antihistamines like quercetin or vitamin C helpful.

What is histamine and why does it matter?

Histamine is a chemical your immune system releases during allergic reactions to help your body fight off what it perceives as threats. While histamine is essential for immune function, too much can cause uncomfortable symptoms like itching, swelling, hives, digestive issues, and in severe cases, dangerous reactions like shock. Understanding your histamine levels helps identify if your symptoms are truly allergy-related or caused by other conditions.

What does high histamine mean?

High histamine levels typically indicate an active allergic reaction or excessive histamine release in your body. This can occur during acute allergic responses, with certain mast cell disorders, or rarely with gastric carcinoid tumors. Elevated histamine explains symptoms like hives, flushing, itching, digestive upset, and in severe cases, low blood pressure or fainting spells.

How often should I retest histamine levels?

Retesting frequency depends on your specific situation and symptoms. If you're being evaluated for a suspected histamine-related disorder, your doctor may retest during active symptoms versus when you're symptom-free. If you're monitoring treatment effectiveness, retesting every 3-6 months may be appropriate. For ongoing conditions, your healthcare provider will determine the best monitoring schedule based on your response to treatment.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. 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. 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. 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. 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. 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. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! 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.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

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.

Histamine Test - Allergic Reactions & Hives Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
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.
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.
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.
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.
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.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

Blood Test for Allergic Reactions and Hives

Histamine, Plasma

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

How should I prepare for this test?

What's included in this test?

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

Blood Test for Allergic Reactions and Hives

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

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

Ask Me Anything