Pigweed Allergy Symptoms and Testing
Below is a plain-language overview of the pigweed allergy symptoms and testing. A pigweed allergy blood test checks for antibodies your immune system makes against pigweed pollen, a common weed allergen. It is ordered when you have allergy symptoms like sneezing, runny nose, or itchy eyes and your clinician wants to confirm whether pigweed is a trigger.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
A pigweed allergy blood test checks for antibodies your immune system makes against pigweed pollen, a common weed allergen. It is ordered when you have allergy symptoms like sneezing, runny nose, or itchy eyes and your clinician wants to confirm whether pigweed is a trigger.
What it measures
- Specific IgE to pigweed pollen — Shows if your immune system has made allergic antibodies to pigweed.
- Total IgE — A general measure of allergic tendency, sometimes included for context.
- Specific IgE to other weed pollens — May be tested together to see if you react to similar weeds like ragweed or sagebrush.
Who it is for
A primary care clinician or allergist typically orders this test for people with seasonal allergy symptoms that may be caused by weed pollen.
Preparation
No fasting or special preparation is needed. The blood sample can be drawn at any time of day.
Results and what they mean
Results are usually reported as a number or class that indicates how much specific IgE was found. Your clinician interprets these results along with your symptoms and history to decide what they mean for you. This is general information only and not medical advice.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the pigweed allergy symptoms and testing is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
What is pigweed?
Pigweed is a common weed whose pollen can trigger allergies in late summer and fall. It is also called amaranth.
Does a positive test mean I am allergic?
A positive test shows your immune system has been exposed and made antibodies, but it does not always mean you have symptoms. Your clinician will consider your symptoms too.
How long does it take to get results?
Results are typically available in 1 to 3 business days.
Can I take allergy medicine before the test?
Most allergy medicines do not affect this blood test, but check with your clinician about any medicines you take.