What Do Allergies Feel Like? Chills, Aches and Fatigue

Allergies usually feel like a stuffy or runny nose, sneezing, and itchy eyes or throat, often with a tired, heavy feeling that lasts as long as you are around your trigger. What do allergies feel like compared with an infection? Itching is the main clue, because colds and the flu rarely cause it. A true fever, shaking chills, and deep muscle aches are not typical of allergies and point more toward a cold or the flu.

The timing tells you a lot too. Allergy symptoms tend to return in the same season each year, flare after time outdoors or around a pet, and hang on for weeks instead of clearing in a few days. Those weeks of symptoms can wear you down. Fatigue is common with allergies, partly because a blocked nose disrupts sleep, and it often improves once the congestion is under control.

Allergies cause itching, sneezing, and congestion that last as long as you are exposed to the trigger, and they do not cause a fever. A cold usually starts with a sore throat and clears within about 7 to 10 days, while the flu tends to come on suddenly with fever, chills, and body aches.

Day to day, allergies can feel like a cold that does not end. The reason is that your immune system treats something harmless, such as pollen, dust mites, mold, or pet dander, as a threat. It releases histamine and other chemicals that cause swelling and itch, and the reaction continues for as long as you are exposed. Our overview of allergies in adults and children covers the common triggers and conditions in more detail.

That swelling and itch usually show up as a few typical complaints:

If you searched for “what does allergies feel like,” that list is the core of it: symptoms sit mostly in the nose, eyes, and throat, and itching is the feature colds and flu rarely share. When your symptoms do not fit neatly, our guide on whether it is allergies or something else walks through the most common lookalikes.

Chills are not a typical allergy symptom, because allergies do not cause a true fever. If you have chills, a raised temperature, or deep muscle aches, an infection such as a cold or the flu is more likely. Allergies can leave you achy and worn down, but that feeling is usually milder and comes with itching and sneezing.

Winter in North Texas adds a complication. Mountain cedar season can hit hard enough that people call it “cedar fever,” even though it rarely causes an actual fever. If you feel flu like every winter, our post on telling a cold from cedar fever explains how to tell them apart.

In any season, call a doctor if you have a fever, symptoms that get worse after a week, trouble breathing, or a cough with colored mucus and chest pain. Those signs suggest something other than allergies.

Allergies can make you feel sick because the reaction affects more than your nose. Allergic rhinitis can include fatigue, sleepiness, and malaise, which is a general feeling of being unwell.

Several parts of the reaction add to that tiredness. The chemicals released during an allergic reaction drive inflammation, and that can leave you drained. A blocked nose pushes you to breathe through your mouth at night, which can lead to snoring and more frequent waking. Older antihistamines such as diphenhydramine can cause drowsiness that carries into the next day. And sneezing, blowing your nose, and coughing all day is tiring in itself.

This is sometimes called allergic fatigue. It often improves once the swelling inside the nose is controlled and sleep gets better.

Allergy fatigue usually eases when you reduce exposure, control the nasal swelling, and protect your sleep. Home changes help, and identifying your specific triggers tells you which changes are worth the effort.

Start with the bedroom, since that is where your sleep happens. Wash bedding in hot water every week, keep pets off the bed, and shower before sleep so pollen in your hair does not end up on your pillow. Our guide to allergy proof your bedroom goes room by room.

Medicine choice matters as well, because some allergy medicines add to the tiredness. Newer antihistamines such as cetirizine, loratadine, and fexofenadine are less likely to cause drowsiness than older ones like diphenhydramine. You can compare them in our list of top non drowsy allergy medications. For congestion that ruins your sleep, a nasal steroid spray used every day targets the swelling inside the nose. A saline rinse after time outdoors can also wash pollen out.

Allergies often show on the face, especially in children. During an exam, a doctor may look for these signs:

If you notice these in your child along with a constant runny nose, allergies may be the cause rather than one cold after another.

Tiredness alone has many causes, so it helps to look at the pattern. An allergy evaluation makes sense when:

If those patterns sound familiar, Dr. M. Waseem Imam evaluates children and adults with ongoing symptoms, fatigue included. The first visit looks at your symptoms, the months they appear, and the medicines you have already tried.

Allergy testing in Dallas Fort Worth at the clinic usually begins with a skin prick panel of up to 100 allergens. It takes around 20 minutes, and you normally get the results before leaving. Antihistamines interfere with skin testing, so you will be asked to pause them for 5 to 7 days beforehand. Blood testing is another option, often for young children. Either way, test results are read together with your history, because a positive result does not always explain every symptom on its own.

With your triggers known, the options are a daily medicine routine, allergy shots in the office, or CureSLIT sublingual drops at home. Shots and drops are forms of immunotherapy. They work on the immune response over time and may reduce symptoms and the need for daily medicine.

Visits take place at three offices. For Grand Prairie and Irving, the nearest office is usually the Arlington allergy clinic. Families near Southlake and North Richland Hills can visit the Keller allergists on Davis Blvd. Farther south, there is also a Mansfield allergy office on Fountainview Dr. Visits can be held in Spanish or Arabic. The clinic is also a teaching site for UNTHSC and TCOM.

If fatigue, congestion, or itchy eyes come back every season and over the counter medicine is not keeping them under control, testing can show which allergens are behind them and what to treat first. When you call, ask whether a same day visit is open.

Book your allergy evaluation or call (817) 678 5575.

Serving Arlington, Keller, Mansfield, and the greater Dallas Fort Worth area.

About Dr. M. Waseem Imam: Dr. M. Waseem Imam, DO, FACAAI, founded Cure Allergy Clinic and serves as its Chief Medical Officer. He is board certified in adult and pediatric Allergy and Immunology.

This blog is for informational and educational purposes only and does not constitute medical advice.