Sleeping with cold air won't directly give you a virus, but it can increase your risk of getting sick by drying out nasal passages, irritating airways, and potentially weakening your immune response, making you more vulnerable to airborne germs, especially if the cold air comes from a poorly maintained AC that circulates dust or mold. While cold itself doesn't cause colds, very low temperatures or extreme chilling can stress your system, making infections like the flu or common cold more likely if viruses are present.
Does Being Cold Make You Sick? Cold weather and frigid temperatures themselves do not manifest common colds or the flu. But physically being cold, physiologically, might contribute to a weakened immune system, therefore making your body more susceptible to viruses and airborne illnesses.
Cold air is generally drier, and your body works to humidify this. In that process, it can cause irritation to the airways, which results in a process called bronchospasm, where those airways narrow and tighten, and you get that feeling of shortness of breath.
The cool air blown out by your fan can irritate your sinuses, dry out your nose, mouth, and throat, and trigger your body to produce excessive mucus, leading to congestion and headaches. Apart from this, sleeping with a fan can result in a sore throat. The constant breeze may cause discomfort if you have allergies.
Sleeping too cold
“When we're cold, our body kicks into high gear to try and get us warm again,” says Dr. Drerup. Blood vessels become constricted, breathing becomes shallow and it puts extra pressure on our cardiovascular system to get our body temperatures regulated again, she adds.
Signs of mild hypothermia include:
The best room temperature for sleep is between 66 to 72°F. Your skin should ideally be between 88 to 95°F during sleep. The temperature under your bed covers should be around 90 to 93°F with 40% to 60% humidity.
Researchers have found that cold air can inflame the lungs and inhibit circulation, which can be challenging for people with asthma and chronic obstructive pulmonary disease (COPD). 12. Keeping your room too cold can even inhibit your body's ability to fight a cold or flu.
Your body's defences may weaken when it's cold
Some early studies have suggested that the cold and dry conditions of winter could make it harder for your immune system to fight off viruses. Your nose and airways are lined with mucus and tiny, hair-like structures called cilia.
Tuning out environmental noises with the soothing sound of white noise from a fan can significantly improve sleep quality. While our ears hear white noise as a grainy static, it contains all of the frequencies found in the spectrum of sounds in equal parts. White noise varies in intensity, which a fan can regulate.
Colds, flus and other respiratory illnesses are often more common in colder months. People are indoors more often, allowing viruses to pass more easily from one person to another. And the cold, dry air may weaken resistance.
Early signs of pneumonia often mimic the flu or a bad cold but worsen, including fever, cough (which might bring up phlegm), fatigue, shortness of breath, and chest pain that worsens with breathing or coughing; other common symptoms are chills, headache, muscle aches, loss of appetite, and sometimes vomiting or diarrhea, with confusion possible in older adults, while infants show fussiness, trouble feeding, and pale skin.
Michael Scharf, inhaling cold air may cause bronchial irritation and cough. If you have asthma or chronic obstructive pulmonary disease (COPD), the cold air “may induce bronchial tightening or constriction leading to cough, wheeze and shortness of breath.” The cold air isn't the only culprit affecting your breathing.
Ideal room temperature for sleeping
According to The Sleep Charity, the ideal bedroom temperature for sleeping is 16–18°C. Anything over 24°C could be too hot and make you restless, while trying to sleep in a cold room with a temperature below 12°C could make it harder to nod off.
Repeated or prolonged exposure to high levels of some VOCs can cause blurred vision, headaches, nausea, dizziness, coughing, burning eyes, respiratory irritation, skin rashes, respiratory illness, concentration difficulties, and other symptoms.
Unfortunately, it is this excessive mucus production that traps bacteria, viruses, and fungi to develop. So, it is not cold or damp air that is the main cause of contracting pneumonia. However, cold and damp rooms and poor ventilation make it easier for bacteria, viruses, and fungi to grow.
4Low indoor temperatures and insulation. Cold air inflames lungs and inhibits circulation, increasing the risk of respiratory conditions, such as asthma attacks or symptoms, worsening of chronic obstructive pulmonary disease (COPD), and infection.
"These symptoms come and go fairly quickly -- you may notice them within an hour or two of entering a building but also notice that they will be gone within an hour or two of leaving a building." There is no objective test that measures these symptoms, McLellan says, so it's more a matter of paying attention to the ...
Cold air can dehydrate your nostrils, throat, and other parts of your body that fight off infections, increasing your risk of an illness. However, cold weather alone cannot make you sick.
The 3-2-1 bedtime method is a simple sleep hygiene strategy: stop eating 3 hours before bed, stop working 2 hours before bed, and stop using screens (phones, tablets, TVs) 1 hour before sleep, helping your body transition to rest by reducing stimulants and digestive load for better sleep quality. A more detailed version adds 10 hours (no caffeine) and 0 (no snoozing) for a 10-3-2-1-0 rule.
Abstract. Background: Cold ambient temperatures are known to increase blood pressure (BP), but the influence of room temperature remains understudied.
Don't be tempted to overheat the room because you have a cold. Keep the temperature at a comfortable level (69F – 72F) and bundle up with blankets that can be shoved off if you begin to overheat. The humidity in the room is important too. Dry air can worsen your cold symptoms and parch your nose and throat.
The ideal sleeping temperature can vary from individual to individual, but the general rule of thumb is that a cooler room can help you sleep better. Your body temperature naturally starts to drop in the late afternoon and into the evening, preparing your body for sleep. It's part of your circadian sleep-wake cycle.
In most cases, yes, 75°F is too hot to sleep in. Your body is designed to sleep in a cooler temperature range around 60°F to 67°F. Much warmer than this and your body has too much difficulty dropping to a low enough core temperature; much cooler than this and you'll be shivering in your bed.
While fans cannot lower the temperature in a room, they can create a breeze that can help cool you. As the Energy Department points out, fans “cool people, not rooms” through the wind chill effect, in which wind displaces warmer air and helps evaporate sweat from the skin, making people feel cooler.