Why does my heater make me feel sick?

Author: Karson Herman  |  Last update: Saturday, April 11, 2026

While in use, heaters lower humidity levels in your home and force hot air through dusty, dirty vents, filters and ducts, if poorly maintained. Constantly breathing extremely warm, dry air that may contain fungi, mold and mildew from the vents can affect your skin, nose, throat and eyes.

Why is the heat making me feel sick?

The combination of fluid loss/dehydration from sweating, with lower blood pressure as a result of all those extra dilated blood vessels, can start to lead to more serious problems and can cause dizziness and fainting, or heat syncope.

How do you tell if your heater is making you sick?

Symptoms of Heater Sickness
  1. Coughing and sneezing.
  2. Sinus infections.
  3. Allergy symptoms.
  4. Headaches.
  5. Fatigue.
  6. Itchy or irritated eyes, nose, or throat.

How do you get rid of heater sickness?

Stay hydrated and take antihistamines, if needed

Lizarzaburu recommends drinking plenty of fluids to keep your throat and nasal passages hydrated. "You can also use a saline nasal spray,” he adds.

Can heat from a heater make you sick?

The most significant downfall of indoor heating is that it causes the air to dry out. Our lungs have to stay moist in order to function properly. Exposure to dry air for a prolonged period of time can cause wheezing, shortness of breath, and other respiratory problems.

The surprising reason you feel awful when you're sick - Marco A. Sotomayor

Why does the heater make me feel sick?

Constantly breathing extremely warm, dry air that may contain fungi, mold and mildew from the vents can affect your skin, nose, throat and eyes. Breathing these air particulates and smelling the bacteria may cause sneezing, congestion headaches, coughing and drying out your eyes, nose and throat.

Why is it hard to breathe when the heater is on?

Radiators heat the air in a room and as the air warms up, it rises in a process known as convection. This causes the warm air to move, which can circulate dust around the room. "If dust is circulated around the room, you can end up inhaling it, which can worsen asthma symptoms," says Jarvis.

How do you fix heat intolerance?

Home Care
  1. Drinking plenty of fluids.
  2. Keeping inside room temperatures at a comfortable level.
  3. Limiting how much time you spend outdoors in hot, humid weather.

What deficiency causes heat intolerance?

Yes, low estrogen levels can cause heat intolerance, particularly in women experiencing perimenopause or menopause. Estrogen plays a key role in regulating body temperature and can lead to symptoms such as hot flashes and night sweats when levels are low.

How do I know if my heater is producing carbon monoxide?

According to the CDC, carbon monoxide is a silent killer that takes hundreds of lives per year. Unfortunately, you cannot tell just by looking at your furnace whether it is leaking carbon monoxide. You need a carbon monoxide detector or other special equipment to test the levels yourself.

Can sitting in front of a heater make you nauseous?

Improperly maintained or faulty fuel-burning heaters can release carbon monoxide gas, which is odourless and colourless. Breathing in high levels of carbon monoxide can lead to carbon monoxide poisoning, resulting in symptoms like headaches, dizziness, nausea, and can even be fatal in extreme cases.

Why does my heater make me dizzy?

Carbon monoxide (CO) is a colorless, odorless, tasteless gas. A by-product of combustion, it can be produced by ordinary appliances, and is a common hazard in the home. Mild exposure can cause symptoms such as nausea, dizziness, or headaches; while severe poisoning can result in brain or heart damage or even death.

Why can't I tolerate the heat anymore?

Other factors that make a person susceptible to heat illness include older age, heart disease, other chronic diseases, extreme exercise, sunburn, obesity, sleep deprivation, alcoholism and certain medications.

What is it called when you feel sick from the heat?

Heat exhaustion is a condition that happens when your body overheats. Symptoms may include heavy sweating and a rapid pulse. Heat exhaustion is one of three heat-related illnesses, with heat cramps being the mildest and heatstroke being the most serious.

Why does my body react badly to heat?

Heat intolerance is also called heat hypersensitivity. It happens when your body does not regulate its temperature correctly and cannot maintain a balance between cold and hot. Heat intolerance causes a more extreme reaction than many people's discomfort when temperatures rise.

Can heat make you nauseous?

Heat exhaustion can occur when you exert yourself, especially in hot weather. Symptoms include heavy sweating, headache, dizziness, nausea and fast heart rate. Immediately stop what you're doing and move to a cooler area. Cool your body and seek medical care.

What is a hot stroke?

Heatstroke happens when body temperature rises quickly and a person can't cool down. It can be life-threatening by causing damage to the brain and other vital organs. It may be caused by doing strenuous activity in the heat or by being in a hot place for too long.

What autoimmune disease causes heat intolerance?

Lupus patients frequently report heat sensitivity, which is associated with inflammatory factors during flare-ups. In multiple sclerosis, symptoms worsen in high temperatures because heat temporarily disrupts communication between already damaged neurons.

How can I make my body tolerate heat?

To get acclimatized, he says, you could go outside on a hot day and engage in mild activity—like taking a walk—for a very short period of time—about 15 minutes—and then repeat the process the following day. It takes the average person between nine and 14 exposures to become acclimatized, Kenney says.

Can heat trigger MS symptoms?

Around three quarters of people with MS find that their symptoms get worse when they are hot. This could be anytime or anywhere. It's usually noticed during exercise, in busy or heated rooms or when it's hot outside.

Why is my heater making me sick?

If you're feeling sick when you start the furnace, you may want to open a window to get fresh air. You should also have a furnace specialist visit to make certain you are not getting sick from carbon monoxide or carbon dioxide.

Why do I feel suffocated in heater?

The continuous use of a heater diminishes the oxygen level, which can cause difficulties such as tiredness, nausea, and headache. Heaters might cause respiratory problems by increasing the level of carbon dioxide and thereby causing a feeling of suffocation.

Why does heat make me feel like I can't breathe?

If you get overheated, your body will call for more oxygen to help bring your temperature down. You might experience this as breathlessness. To avoid an asthma attack or a COPD flare caused by overheating, stay indoors during the hottest parts of the day.

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