Can you get a sinus infection from a dirty air conditioner?

Author: Janet Tillman  |  Last update: Tuesday, January 20, 2026

In fact, you should go a step further and regularly service your air conditioning unit if you're prone to sinus problems. Mold, dust, and pollen can get caught in the coils and be recycled back into the air you breathe, irritating your already compromised sinuses.

What are the symptoms of AC sinusitis?

Symptoms
  • Thick, yellow or greenish mucus from the nose, known as a runny nose, or down the back of the throat, known as postnasal drip.
  • Blocked or stuffy nose, known as congestion. ...
  • Pain, tenderness, swelling and pressure around the eyes, cheeks, nose or forehead that gets worse when bending over.

What are the symptoms of air conditioning sickness?

  • Headaches And Feeling Dizzy. Unaccounted headaches are common during summer, especially for those who stay indoors for long. ...
  • Dry Skin From Low Humidity Levels. ...
  • Common Cold Or Other Respiratory Issues. ...
  • Heat Intolerance & High Blood Pressure. ...
  • Sore Throat And Difficulty Breathing.

How do I prevent sinus infections from an air conditioner?

Remember, when you don't maintain your AC filters, you add more allergens to the air you breathe. Finally, if you have sinus issues caused by cool, dry air alone, we recommend drinking plenty of fluids to stay properly hydrated and using a humidifier to increase the moisture in your environment.

Can you get sick from not cleaning your air conditioner?

When you fail to maintain your air conditioner, it collects high concentrations of dust, pollen, and mold. At best, this could exacerbate allergies and asthma. At worst, it can cause infections.

VERIFY: Do air-conditioners cause sinus congestion?

What are the symptoms of a dirty air conditioner?

5 Health Problems Caused by a Dirty AC
  • Allergies. If your AC becomes dirty, then you will likely begin to have problems with allergies. ...
  • Fatigue. The quality of the air that you breathe also directly affects your endurance and stamina. ...
  • Dry Skin. ...
  • Airborne Illnesses. ...
  • Noise Pollution.

Can air conditioning give you sinus problems?

The way that air conditioners work is to blow out cool - but dry - air. This can mean that if you're in an air conditioned environment for some time your ears, nose and throat can suffer because there is a significant loss of humidity. This can dry out the mucus membrane in the middle ears and also the nasal passages.

Can mold in AC cause sinus infection?

In fact, you should go a step further and regularly service your air conditioning unit if you're prone to sinus problems. Mold, dust, and pollen can get caught in the coils and be recycled back into the air you breathe, irritating your already compromised sinuses.

Can you get a respiratory infection from air conditioning?

Poorly maintained air-conditioning systems can cause respiratory tract infections, such as the common cold, flu, tonsillitis, coughs, and everything in between. Dirty filters are the most common culprits. Filters in an air-con system are there to remove bacteria and other contaminants.

Can sleeping in AC cause sinus?

The sudden temperature changes between the cool indoor environment and the hot outdoor environment can cause blood vessels in the head to constrict and expand rapidly, leading to headaches. Additionally, prolonged exposure to cold, dry air can cause sinus congestion and exacerbate migraines.

How to get rid of air conditioning sickness?

A dehumidifier or smart AC settings can help. Invest in Air Purification: Air purifiers with HEPA filters can remove the smallest particles from your air. Get Professional HVAC Check-Ups: An expert can spot and mitigate hidden mold growth or other issues in your system.

What are the symptoms of mold in the air conditioner?

Mould in your air conditioner can lead to sickness in a variety of ways, from severe respiratory symptoms like shortness of breath and wheezing to nausea, vomiting, or dizziness.

Is sleeping in AC bad for health?

​Exposure to AC will affect respiratory health​

Sleeping in a room with the AC on can lead to respiratory problems, particularly for individuals who are sensitive to cold air or have existing respiratory conditions such as asthma or allergies.

How do I get rid of a sinus infection asap?

The following might help ease sinusitis symptoms:
  1. Saline nasal spray. Salt water sprayed into the nose many times a day rinses the inside of the nose.
  2. Nasal corticosteroids. These nasal sprays help prevent and treat swelling. ...
  3. Decongestants. ...
  4. Allergy medicines. ...
  5. Pain relievers.

What are the three major causes of sinusitis?

Sinusitis is present when the tissue lining the sinuses become swollen or inflamed. It occurs as the result of an inflammatory reaction or an infection from a virus, bacteria, or fungus.

Can a dirty AC unit make you sick?

But, if they are not changed often enough, they can make you sick. Old filters can harbor bacteria and mold, which can cause respiratory problems. So, if you or someone in your family has asthma, it is essential to change the air filter regularly.

What are the first signs of Legionnaires' disease?

Legionnaires' disease, the pneumonic form, has an incubation period of 2 to 10 days (but up to 16 days has been recorded in some outbreaks). Initially, symptoms are fever, loss of appetite, headache, malaise and lethargy. Some patients may also have muscle pain, diarrhoea and confusion.

What are the symptoms of air conditioner bacteria?

Legionella bacteria can proliferate in air conditioning systems, particularly in cooling towers. Inhalation of contaminated aerosols can lead to Legionnaires' disease, a severe form of pneumonia. Symptoms include high fever, cough, and muscle aches. In extreme cases, it can be fatal.

What are the 10 warning signs of mold toxicity?

Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
  • Nasal and sinus congestion.
  • Eye irritation, such as itchy, red, watery eyes.
  • Wheezing and difficulty breathing.
  • Cough.
  • Throat irritation.
  • Skin irritation, such as a rash.
  • Headache.

What in my house is causing sinus problems?

Pollen, dust, pet dander, dust mites, mold, fungus, and mildew are always floating around outside the home and inside, even with a particularly good HEPA filter. Likewise, fumes from building projects and strong chemicals with irritating scents (such as formaldehyde) could also cause problems with the sinuses.

What kills fungus in the sinuses?

Antifungal medications can be used as well, but usually not without a surgery. There have been some studies that indicate that antifungal medications called “azoles,” such as itraconazole, can be useful in treating allergic fungal sinusitis. With invasive fungal sinusitis, use of antifungal medications is required.

Can sleeping in a cold room cause sinus problems?

Cold weather can have a significant impact on sinus issues, as the change in temperature and humidity can irritate the sinuses and lead to congestion, headaches, and other symptoms. One of the main ways that cold weather can affect the sinuses is by drying out the air.

How do you know if your air conditioning is causing allergies?

No, you likely aren't allergic to the air conditioner itself. However, your AC unit can stir up allergens already present in your home, triggering allergy symptoms like sneezing, coughing, and itchy eyes.

Can poor air quality cause sinus infections?

Unfortunately, it turns out that pollutants in the air can also play a role in chronic sinus conditions. A recent study from Johns Hopkins University has revealed that air pollution in many areas can now lead to chronic sinusitis, more commonly known as a sinus infection.

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