Katrina Rosales
Incense is a smoke-emitting substance that has been used for thousands of years for hygienic, spiritual, and health purposes. However, recent studies have shown that incense smoke contains particulate matter, gas products, and other organic compounds that can cause air pollution and have negative health effects. The length of time that incense smoke lingers depends on the type of incense and the size of the room. Some incense will leave a lingering fragrance for a few hours, while others will only last for about 30 minutes. To reduce exposure to hazardous chemicals, it is recommended to burn incense in a well-ventilated area and to avoid confined spaces.
| Characteristics | Values |
|---|---|
| Time taken for incense smoke to go away | 30 minutes to a few hours |
| Factors affecting the time | Type of incense, size of the room, Ventilation |
| Health risks | Asthma, Cancer, Heart disease, Dermatological problems, Respiratory issues, Eye irritation, Nausea |
| Preventive measures | Burning in a well-ventilated area, avoiding confined spaces, using an air purifier |
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What You'll Learn
Incense smoke contains hazardous chemicals
The sweet-smelling smoke released from burning incense contains hazardous chemicals that can be harmful to human health. The smoke emitted from incense burning is a complex mixture of suspended particulates and harmful gases.
Incense smoke contains particulate matter (PM), which includes dust, smoke, and haze particles suspended in the air. These particles are small and inhalable, and can lead to negative health outcomes. A 2021 study confirmed that some of the particulate matter in incense smoke is carcinogenic, meaning it can cause cancer. The particulate matter in incense smoke has also been linked to an increased risk of nasopharyngeal carcinoma in male patients. Furthermore, incense smoke has been associated with respiratory issues, including cough symptoms and allergic contact dermatitis.
In addition to particulate matter, incense smoke also contains gas products such as carbon monoxide (CO), carbon dioxide (CO2), nitrogen dioxide (NO2), and sulfur dioxide (SO2). These gases can have adverse effects on human health. For example, exposure to sulfur dioxide and nitrogen dioxide can lead to reduced work capacity, aggravation of cardiovascular diseases, respiratory illnesses, and alterations in the lung's defense system. Carbon monoxide, a colorless, odorless, and poisonous gas, can cause headaches, dizziness, weakness, and nausea in low concentrations, and can even be fatal at high concentrations.
The composition of incense sticks includes coal powder, which aids in smoother burning. However, the analysis of incense stick ash has revealed the presence of toxic heavy metals and oxides, including calcium oxide, silica, alumina, ferrous, potassium oxide, phosphorus oxide, and magnesium oxide. The incomplete burning of incense sticks can result in the release of these toxic substances into the air, posing potential health risks.
To reduce exposure to the hazardous chemicals in incense smoke, it is recommended to limit incense use, open windows during and after burning, and explore alternative options if concerned about the risks.
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Incense smoke may cause health issues
A 2020 study found that burning incense may cause issues with brain health in community older adults over 65 years of age. Other issues include delays in cognitive performance and a decrease in brain connectivity. This could stem from long-term air pollution caused by burning incense, resulting in smaller brain and prefrontal cortex volumes.
In addition, incense smoke has been associated with dermatological problems, such as itchy depigmented macules on the dorsum manus, left shoulder, and abdomen. It has also been indicated to cause allergic contact dermatitis and other allergic reactions.
To reduce exposure to incense smoke, it is recommended to burn incense in a well-ventilated area or outdoors. Some people also use a towel to block the smoke from escaping a room, but this can cause mold. It is important to note that while some studies have found potential health risks associated with incense smoke, further research is needed, especially on humans.
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Incense smoke can cause indoor air pollution
A study in 2021 confirmed that some of the particulate matter in incense smoke is carcinogenic, meaning it could cause cancer. There is an association between higher cancer risk and incense use. In 2008, a review article by Lin et al. revealed that when incense smoke pollutants are inhaled, they cause airway dysfunction. Other studies have found that incense smoke is a risk factor for elevated cord blood IgE levels and has been linked to allergic contact dermatitis, neoplasm, and respiratory system dysfunction.
The effects of incense smoke on health are not yet fully understood, and more research is needed to determine the precise mechanisms behind the relationships between incense burning and health issues. However, it is generally recommended to reduce exposure to incense smoke and to keep rooms well-ventilated when burning incense to effectively dilute indoor air pollutants and reduce the risk of exposure.
Additionally, the smoke emitted by burning incense has been found to contain polycyclic aromatic hydrocarbons (PAHs). In temples, especially during festivals, the concentration of PAHs can be significantly higher indoors than outdoors. For example, during the Lunar New Year in the Long-Shang Temple in Taipei, Taiwan, the dense incense smoke caused irritation to the eyes of a worshipper.
To reduce exposure to incense smoke, it is advisable to limit the burning of incense, especially in enclosed spaces, and to ensure proper ventilation. Some people also recommend using a towel to block the smoke from escaping the room, but this can cause mold issues, so it is generally recommended to avoid this method.
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Incense smoke may linger for hours
The duration of incense smoke lingering depends on the type of incense and the size of the room. Synthetic fragrances, such as those used in dipped sticks and most Indian-style incense, tend to linger much longer than natural fragrances, like those used in most Japanese and Tibetan-style sticks. Synthetics can often be noticeable for hours, whereas natural fragrances typically last under an hour.
Some incense users have reported lingering scents for a few hours, while others have noticed the smell dissipating after 30 minutes. The scent of Tibetan incense tends to linger but not as long as other varieties, and generic joss sticks purchased from a local Asian grocery store have been observed to lose their scent quickly once burned out.
To reduce exposure to incense smoke, it is recommended to burn incense in a well-ventilated area. Burning incense in a poorly ventilated room can cause the concentration of smoke to build up, which may lead to adverse health effects. Incense smoke has been associated with an increased risk of respiratory issues, dermatological problems, and even heart disease.
To minimize the lingering of incense smoke, ensure proper ventilation during and after burning incense. Opening windows or using fans can help disperse the smoke and reduce exposure to hazardous chemicals. Additionally, consider using an air purifier to improve indoor air quality.
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Incense smoke may irritate pets
The scent of incense can linger for a long time, and the smoke can be slow to dissipate. To speed up the process, you can open windows or use a fan to improve ventilation. Using a wet towel to block the bottom of a door can also help to contain the smoke in one room.
Pets, such as cats and dogs, have a much stronger sense of smell than humans. Cats, for example, have over 200 million odour sensors in their noses, compared to just five million in humans. This means that even if incense smoke doesn't bother you, it could be irritating for your pets.
Some pets may be sensitive or allergic to certain scents, and the smoke can irritate their lungs and eyes, especially if they already have respiratory issues. For example, dogs with flat faces or short snouts can develop breathing problems as they get older, and incense smoke can make it even more difficult for them to breathe.
In addition to respiratory issues, incense smoke has been linked to other health problems in pets, including allergic contact dermatitis and potential toxicity. Some herbs commonly used in incense, such as lavender and bergamot, are known to be toxic to cats, and the synthetic fragrance oils used in some incense can be toxic to both pets and humans.
Therefore, it is important to pay attention to how your pets behave around incense. If they seem to be bothered by it, it's best to avoid burning incense around them or to switch to low-smoke or smoke-free alternatives.
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Frequently asked questions
It depends on the type of incense and the size of the room. Synthetic fragrances can linger for hours, while natural fragrances usually last under an hour.
Incense smoke contains hazardous chemicals, including benzene, toluene, and polycyclic aromatic hydrocarbons (PAHs). These chemicals can cause respiratory problems, eye irritation, and nausea. Recent studies have also found links between incense smoke and an increased risk of heart disease, cancer, and brain health issues in older adults.
It is recommended to burn incense in a well-ventilated area and to avoid confined spaces. Opening windows or turning on a fan can help disperse the smoke. It is also important to keep incense away from flammable objects and never leave it unattended.
If you are concerned about the health risks of incense, you can use an oil diffuser or an air purifier to achieve a similar fragrance without the smoke.
Pets and children create a greater risk of fire or injuries when incense is present. Curious pets and children can easily knock over a burning incense stick, and the smoke can be irritating or harmful to pets. It is recommended to keep them away from the room when burning incense.
