Alternaria Tenuis Mold Allergy in San Tan, Arizona

Sudden sneezing, itchy eyes, or congestion after a summer storm or fall hike? Alternaria tenuis, a microscopic mold found on decaying leaves and organic matter, may be the cause. Its airborne spores can trigger allergy symptoms in sensitive individuals, making it a common concern across North America, including San Tan.

About Alternaria Tenuis

• Origin: Naturally found throughout North America

• Season: Late summer to early fall (August–October)

• Exposure: Raking, mowing, or disturbing leaves can release spores

Symptoms

• Runny or stuffy nose

• Itchy, watery eyes

• Sneezing, coughing, or scratchy throat

• Postnasal drip, headaches, or facial swelling

• Difficulty breathing in severe cases

Prevention

• Track mold spore counts and limit outdoor activity when high

• Keep windows closed and use HEPA air purifiers

• Shower and change clothes after outdoor exposure

• Reduce indoor humidity and avoid disturbing decaying leaves

Risk Factors

• Family history of allergies

• Hay fever or asthma

• Exposure to damp environments

Treatment

• OTC medications: Antihistamines and decongestants

• Nasal corticosteroids: Reduce inflammation

• Allergy shots (immunotherapy): Gradually desensitize the immune system

Expert Care in San Tan

At Enticare in San Tan, Arizona, our ENT specialists provide personalized evaluation and treatment for Alternaria tenuis and other mold allergies. Breathe easier and enjoy the outdoors with expert care.

Call 480-214-9000 to schedule an appointment today.