Sinusitis is inflammation of the sinus cavities causing facial pressure, congestion, and headaches. It is caused by viral infections, bacterial infections, or allergic reactions to environmental molds like Alternaria alternata and Rhizopus nigricans. The Alternaria alternata (m6) IgG test is the most important test for identifying mold allergies that trigger chronic sinusitis.
90-day money-back guarantee
Lab order in minutes
Save a trip to the doctor
Low prices since 2005
Labs within 2 miles
Sinusitis is caused by inflammation and swelling of the sinus lining, which can result from viral infections, bacterial infections, or allergic reactions. Viral upper respiratory infections are the most common trigger, causing the sinus passages to become blocked and filled with fluid. Environmental allergens like mold spores (Alternaria alternata and Rhizopus nigricans), dust mites, pollen, and pet dander can trigger chronic sinusitis in allergic individuals. When allergens enter the nasal passages, they cause the immune system to release histamine and other chemicals that inflame the sinus tissues, leading to persistent congestion, facial pressure, and mucus production that can last for months.
The Alternaria alternata (m6) IgG test is the most important blood test for chronic sinusitis because it detects antibodies to one of the most common environmental molds that trigger ongoing sinus inflammation. This test identifies whether your immune system is reacting to Alternaria alternata mold, which grows on plants, soil, and damp indoor environments. The Allergen Specific (m11) IgG Rhizopus nigricans test is also essential for comprehensive allergy evaluation, as it detects antibodies to another common mold that causes chronic sinus problems. These tests help identify the specific allergens contributing to your sinusitis, allowing you to take targeted action through environmental control measures and appropriate treatment. While sinusitis itself is diagnosed through clinical examination and imaging, these blood tests reveal the underlying allergic triggers that keep symptoms coming back.
You should get tested if you experience sinus symptoms that last longer than 12 weeks despite treatment, have frequent sinus infections that occur four or more times per year, or notice that your symptoms worsen in certain environments like basements or during humid weather. Testing is especially important if over-the-counter decongestants and nasal sprays provide only temporary relief, or if you have other allergic conditions like asthma or eczema alongside your sinus problems. Consider testing if you wake up with facial pressure and congestion, experience post-nasal drip that causes chronic cough, or notice thick discolored nasal discharge that keeps returning. Early identification of mold allergies can help you modify your environment and prevent the cycle of chronic inflammation.
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
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.
Recommended actions
Increase resistance or strength training
Prioritize 7–8 hours of quality sleep per night, try to reduce stress
Include more zinc- and magnesium-rich foods (like shellfish, beef, pumpkin seeds, spinach)
Consider retesting in 3–6 months
Not overhyped or overpriced. Just comprehensive blood testing made simple and for everyone.
505 reviews
Sample results
Your 24/7 Lab Guide
Quick questions:
