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You are not alone. More than 50 million people in the U.S. experience allergies each year — and many people have more than one. Allergies are the sixth leading cause of chronic illness in the United States, generating over $18 billion in annual costs.
But knowing the statistics is only half the picture. What matters is recognizing whether you or someone in your family has one of these conditions — and knowing what you can actually do about it.
Here are the 10 most common allergies, who they affect, what symptoms they cause, and where to start if you think you have one.
Medical Disclaimer: The information on this page is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. If you suspect you have an allergy, consult a qualified allergist or healthcare provider for proper diagnosis and treatment.
1. Pollen Allergies (Hay Fever / Allergic Rhinitis)
Pollen allergies — also called hay fever or allergic rhinitis — are the most common allergy in the United States. According to the Asthma and Allergy Foundation of America (AAFA), pollen allergies affect up to 30% of adults and 40% of children.
Common symptoms: Sneezing, runny or stuffy nose, itchy and watery eyes, itchy throat or ears, and fatigue. Symptoms are typically worst during spring (tree pollen), summer (grass pollen), and fall (weed pollen).
What helps: Keep windows closed during high pollen days. Shower and change clothes when coming inside after outdoor activities. Run a true HEPA air purifier indoors. Check daily pollen counts in your area before planning outdoor activities.
→ How do you know if you are allergic to pollen?
2. Dust Mite Allergies
Dust mite allergies affect up to 20 million Americans according to the AAAAI — and they are the most common cause of year-round allergy symptoms. Dust mites are microscopic creatures that live in mattresses, pillows, carpets, and upholstered furniture, feeding on dead skin cells. It is not the mite itself that triggers reactions — it is the protein in their fecal matter and decomposing body fragments.
Common symptoms: Sneezing, runny or stuffy nose, itchy eyes, coughing, and worsening asthma symptoms — often worst in the morning after sleeping in an allergen-filled bed.
What helps: Allergen-proof zippered encasements for your mattress, box spring, and pillows are the single most recommended environmental control step — identified as such by the AAAAI and ACAAI Joint Practice Parameter. Wash bedding weekly. Keep indoor humidity between 30-50%. Run a HEPA air purifier in the bedroom.
→ How to get rid of dust mites: 6 highly effective methods
→ Shop allergen-proof mattress covers
3. Pet Allergies
Pet allergies affect up to 30% of people with allergies according to the AAFA. The allergen is not fur — it is a protein found in pet skin cells, saliva, and urine. For cats, the primary culprit is a protein called Fel d1. Every cat and dog produces these proteins, which is why truly hypoallergenic pets do not exist.
Common symptoms: Sneezing, runny nose, itchy eyes, skin rash or hives after contact with the animal, and worsening asthma. Symptoms can appear even in homes where no pet currently lives — pet allergens persist on surfaces for months.
What helps: Keep pets out of the bedroom. Wipe pets down weekly with Allerpet to reduce allergens on their coat. Treat carpet and upholstery monthly with ADMS Anti-Allergen Spray. Run a HEPA air purifier in rooms where pets spend time.
→ Cat dander allergy relief: how to live with cats when you're allergic
4. Mold Allergies
The National Institute of Environmental Health Sciences (NIEHS) estimates mold allergies affect approximately 10% of the U.S. population. Mold releases microscopic spores into the air — both outdoors in decaying vegetation and indoors wherever moisture is present. Indoor mold can be a year-round problem.
Common symptoms: Sneezing, runny nose, itchy eyes, coughing, and worsening asthma. Symptoms often spike in damp conditions, after rain, or in older buildings. Year-round symptoms that do not improve in winter may point to indoor mold exposure.
What helps: Keep indoor humidity below 50% — mold cannot grow without moisture. Fix leaks promptly. Run a HEPA air purifier. Check basements, bathrooms, and HVAC systems regularly for visible growth.
→ Mold spores in the home: where they hide and how they spread
→ How humidity affects dust mites and mold growth
5. Food Allergies
The CDC estimates 32 million Americans have food allergies. The nine most common food allergens — milk, eggs, peanuts, tree nuts, wheat, soy, fish, shellfish, and sesame — account for the vast majority of reactions. Food allergies can range from mild (hives, stomach upset) to severe and life-threatening (anaphylaxis).
Common symptoms: Hives, swelling of the lips or tongue, stomach cramps, nausea, vomiting, diarrhea, and in severe cases difficulty breathing and anaphylaxis.
What helps: Strict avoidance of the trigger food is the primary management strategy. Anyone with a history of severe reactions should carry an epinephrine auto-injector (EpiPen) at all times. Read ingredient labels carefully — food allergens appear in unexpected places.
6. Insect Sting Allergies
The AAAAI reports that 5% to 7.5% of the general population will experience an allergic reaction to insect stings — bees, wasps, hornets, and yellow jackets. For most people, a sting causes local swelling and pain. For those with an insect venom allergy, the reaction can be systemic and life-threatening.
Common symptoms: Beyond the expected local pain and swelling, allergic reactions include hives, swelling in areas away from the sting site, difficulty breathing, dizziness, and anaphylaxis.
What helps: Anyone who has had a systemic reaction to an insect sting should see an allergist. Venom immunotherapy (allergy shots) is highly effective for insect sting allergy — it can reduce the risk of future severe reactions significantly. Carrying an epinephrine auto-injector is essential for anyone with a known venom allergy.
7. Contact Dermatitis (Chemical and Material Allergies)
The AAAAI reports that contact dermatitis affects up to 20% of the population. It occurs when skin comes into direct contact with a substance that either irritates it (irritant contact dermatitis) or triggers a delayed immune reaction (allergic contact dermatitis). Common triggers include fragrances, nickel, latex, preservatives in cosmetics, and cleaning products.
Common symptoms: Red, itchy, inflamed skin — often appearing 24 to 96 hours after contact with the trigger. The delayed reaction is what makes contact dermatitis so easy to misdiagnose — the rash appears long after the triggering exposure.
What helps: Identifying the trigger through patch testing is the first step. Fragrance-free and dye-free personal care and laundry products eliminate two of the most common contact allergens.
→ The mystery of contact dermatitis: why patch testing is different
8. Latex Allergies
The American College of Allergy, Asthma and Immunology (ACAAI) reports that up to 6% of the general population may have a latex allergy — with significantly higher rates among healthcare workers and people who have had multiple surgeries. Latex proteins can trigger reactions through skin contact or inhalation of airborne latex particles.
Common symptoms: Skin irritation, hives, runny nose, and in severe cases anaphylaxis. Latex allergies can also cause cross-reactions with certain foods — bananas, avocados, kiwi, and chestnuts contain proteins similar to latex proteins.
What helps: Strict avoidance of latex products. Inform all healthcare providers of the allergy before any procedure. Look for latex-free alternatives for gloves, bandages, and medical supplies.
9. Medication Allergies
The AAAAI states that up to 10% of the U.S. population may have a medication allergy. Antibiotics — particularly penicillin — are the most common culprit, followed by aspirin, NSAIDs, and certain chemotherapy drugs. True medication allergy (immune-mediated) is different from medication intolerance (side effects) — the distinction matters for treatment decisions.
Common symptoms: Hives, rash, fever, swelling, shortness of breath, and in severe cases anaphylaxis. Symptoms typically appear within hours of taking the medication, though some reactions can be delayed.
What helps: Inform all healthcare providers and pharmacists of any medication allergy before receiving treatment. Wear a medical alert bracelet if you have a history of severe medication reactions. An allergist can perform drug allergy testing to clarify whether a true allergy exists or whether a medication can be safely reintroduced.
10. Sun Sensitivity (Photoallergy)
The British Association of Dermatologists reports that 10% to 15% of the population may have some form of sun sensitivity or photoallergy. Unlike sunburn — which affects everyone with sufficient UV exposure — photoallergy is an immune-mediated reaction to UV light, often triggered by an interaction between sunlight and certain chemicals on the skin (sunscreens, fragrances, medications).
Common symptoms: Itchy rash, hives, or blistering in sun-exposed areas, often appearing hours after exposure rather than immediately. The rash may spread beyond sun-exposed areas in true photoallergic reactions.
What helps: Identify and avoid the triggering chemical. Wear broad-spectrum sun protection. A dermatologist can perform photopatch testing to identify the specific trigger.
Have More Than One? You're Not Alone
Many allergy sufferers have more than one allergy — and there is a reason for that. Once your immune system has learned to treat one harmless substance as a threat, it becomes more likely to do the same with others. The biological mechanisms are shared. The management principles overlap. And the most effective approach addresses all of them together rather than treating each one in isolation.
For the allergens that affect your home environment — dust mites, pet dander, mold, and pollen — the single most useful resource we have is our free guide to allergy-free living. It covers the complete strategy for reducing indoor allergen exposure, from bedroom encasements to air filtration to laundry practices, built on 35 years of helping people manage exactly these conditions.
Read the Practical Guide to Allergy-Free Living →
Not sure where to start? Call us at (800) 771-2246 — we have been helping people navigate this since 1989.
About the Author
The Allergy Store is a family-owned and operated business founded in 1989 that specializes in non-drug solutions for allergies and asthma. With decades of hands-on experience — and firsthand experience living with allergies — the team focuses on education, allergen control, and improving indoor environments. Every product recommended is carefully researched, tested, and used in their own homes and offices to help individuals and families breathe easier and live more comfortably.
Sources
Asthma and Allergy Foundation of America (AAFA): aafa.org/allergy-facts
Centers for Disease Control and Prevention (CDC): cdc.gov
American Academy of Allergy, Asthma and Immunology (AAAAI): aaaai.org
National Institute of Environmental Health Sciences (NIEHS): niehs.nih.gov
American College of Allergy, Asthma and Immunology (ACAAI): acaai.org
British Association of Dermatologists (BAD): bad.org.uk