Heidi Norton
Many people experience headaches after being exposed to perfumes and other strong scents. This phenomenon is known as a perfume-related headache or olfactory migraine attack. The exact reason why perfumes cause headaches is not yet known, but there are several theories. One theory suggests that the smell of perfumes directly interacts with the trigeminal nerve, a sensory pathway that runs from the nose and mouth to the brain. Another theory posits that perfumes trigger the release of inflammatory substances in the brain, causing pain. Some people may also have a fragrance sensitivity or allergy, which can lead to allergy-like symptoms such as headaches, watery eyes, and a runny nose. Additionally, the emotional response to certain smells can also play a role in triggering headaches. To manage perfume-related headaches, it is recommended to avoid strong scents, and treat the symptoms with over-the-counter pain relievers or fresh air.
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What You'll Learn
Perfume's chemical composition
Perfumes are made up of a base and a fragrance compound. The base is usually alcohol or water, with ethyl alcohol being the most common form of alcohol used due to its ability to help the fragrance spread out and evaporate quickly. Other bases include coumarin, benzyl benzoate, phthalates, and beeswax.
The fragrance compound can be synthetic or taken from a plant or animal. Synthetic fragrances are usually derived from petroleum or chemically modified natural substances. Natural fragrances are extracted from flowers, plants, or animals.
Perfumes contain dozens of compounds and synthetic volatile chemicals that create an odour. Some common synthetic chemicals used in perfumes include calone, which adds a fresh water-like note, and iso e super, which has a woody and velvety aroma. Some natural compounds found in perfumes include benzyl alcohol, limonene, ethyl alcohol, and kashmirin.
The scent of a perfume is not only determined by its chemical composition but also by how a person is chemically wired to perceive it. Individual genetic codes result in different smell receptors, causing a smell to be perceived differently by different people. Additionally, chemical reactions caused by light can morph the smell of a perfume by breaking the bonds in its fragrance molecules.
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Perfume allergy
A perfume or fragrance allergy occurs when an individual has an allergic reaction to an ingredient in a perfume. This reaction can be caused by an organic protein in a perfume ingredient, which triggers an inflammatory response from the body. However, it is important to note that most reactions are simply perfume sensitivities, rather than true allergies.
Perfumes contain dozens of compounds and synthetic volatile chemicals that create an odour. These ingredients can act as triggers for individuals with fragrance sensitivity, leading to various health effects such as headaches, migraines, nausea, and allergic contact dermatitis. In some cases, individuals may experience osmophobia, which is defined as a fear, aversion, or psychological hypersensitivity to smell.
The symptoms of a perfume allergy can vary in severity. Mild symptoms may include itching or a rash, while more severe reactions may manifest as swelling in the mouth, lips, or tongue, making it difficult to breathe, eat, or speak. Anaphylaxis, a life-threatening reaction characterized by the closure of airways, may also occur in rare cases.
To manage a perfume allergy, individuals can consider getting contact allergen testing to identify specific triggers. Treatment options may include medications, topical ointments, and oatmeal baths. It is also recommended to minimize exposure to scented products and strong fragrances, especially in enclosed spaces.
It is worth noting that companies are not required to disclose the full list of ingredients in their perfumes, as the formula is often considered a trade secret. This can make it challenging for individuals with allergies or sensitivities to identify specific triggers.
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Perfume sensitivity
Perfumes are composed of numerous chemical elements, typically ranging from 100 to 350 ingredients, and these chemicals can act as triggers for people with perfume sensitivity. The specific chemicals that may be responsible for adverse reactions include linalool, citronellol, geraniol, coumarin, and citral. Unfortunately, brands are not obligated to disclose the full list of ingredients in their perfumes, as the formula is often considered a trade secret. This lack of transparency can make it challenging for individuals with perfume sensitivity to make informed choices.
The sense of smell is unique in its direct connection to our emotional system. When we perceive a smell, we process it not only based on the odour chemicals but also through our associated memories and emotions. Therefore, a particular perfume might evoke negative emotions linked to a past experience, triggering a fight-or-flight stress response in the body. Additionally, certain odours are believed to cause blood vessels to swell and dilate, stimulating the nerve system in the brain associated with head pain.
Experts have also explored potential physiological mechanisms behind perfume sensitivity. One theory suggests that odours may directly interact with the trigeminal nociceptive pathway, a sensory pathway extending from the nose and mouth into the brain via the trigeminal nerve. Alternatively, smells may trigger the release of inflammatory substances in the brain, causing pain. Furthermore, odours can activate the trigeminovascular system and dural pain receptors, inducing a state of heightened reactivity to pain.
Managing perfume sensitivity primarily involves avoiding strong scents and potential triggers as much as possible. Over-the-counter pain relievers, such as ibuprofen and acetaminophen, can help alleviate headache symptoms when exposure occurs. Additionally, seeking advice from a healthcare professional is recommended to determine specific triggers and appropriate treatments.
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Odour intolerance
The exact mechanism by which odours trigger headaches is not yet fully understood by experts. One hypothesis suggests that the smells directly interact with the trigeminal nociceptive pathway, a sensory pathway extending from the nose and mouth to the brain via the trigeminal nerve. Alternatively, it is proposed that fragrances may trigger the release of inflammatory substances in the brain, inducing pain. Additionally, fragrances may activate the trigeminovascular system and dural pain receptors, enhancing sensitivity to pain.
A 2017 study found that perfumes, particularly those with floral scents, commonly triggered migraine episodes. Furthermore, a 2016 study on 113 people concluded that odours were a prevalent trigger for migraines, affecting 90.2% of participants, with perfume odour being the most common trigger. Interestingly, 70% of migraine sufferers experienced migraines after 20 minutes of perfume exposure, while tension headache sufferers were unaffected.
While there is no specific treatment for odour intolerance, individuals can manage their symptoms by minimising exposure to fragrances and scented products. This may include avoiding stores with strong odours or places that sell perfumes and other fragranced items. Checking product labels and choosing brands that disclose their ingredients can also help identify and avoid potential triggers.
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Negative associations with odours
The human olfactory system is incredibly powerful, and the sense of smell is very personal, based on myriad experiences. How we respond emotionally to certain smells is subjective and may be triggered by smells we are not consciously aware of smelling or reacting to.
If you tend to get headaches when you smell certain scents, it may be due to a negative association with that odour. For example, you may associate the smell of a particular perfume with a negative memory, such as the same perfume your ex-partner used to wear. One whiff may cause all those negative emotions to come rushing back, leading your body to generate a fight-or-flight stress response.
In other cases, a person may be allergic to a chemical element creating the smell. Fragrances are composed of numerous chemical elements, which can range from 100 to 350 ingredients in classic perfumery. The chemicals that activate the smell signals in our brain (called odorants) can sometimes irritate our sinuses, leading to allergy-like symptoms.
Some experts estimate that as many as 30% of people may have sensitivities to certain odours. For these people, a simple whiff of perfume can trigger headaches and other allergy-like symptoms. Fragrance sensitivities are on the rise, perhaps due to the numerous scented products available today, from air fresheners to laundry detergents.
Osmophobia, defined as an intolerance to odours, is rare on its own, but people who suffer from chronic headaches tend to also experience osmophobia. A 2016 study found that 90.2% of participants experienced migraines triggered by odours, with perfume being the most common trigger.
While smell isn't always the direct trigger for migraines, it may be a sign of an oncoming headache. Some people report perceiving phantom smells before a migraine, such as a burning smell.
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Frequently asked questions
Perfume and other strong odors may trigger headaches and migraine episodes in some individuals. Some people may refer to them as “perfume-related headaches” or “olfactory migraine attacks.” It is believed that the smell of a strong, floral perfume may be heavenly to some, while it may give others a headache.
There are many reasons why people can get a physical reaction to strong smells. One of the reasons could be that the smell of the perfume reminds you of a negative memory, and that association may cause a fight or flight stress response in your body. Another reason could be that the chemicals that activate the smell signals in our brain (called odorants) irritate our sinuses, causing allergy-like symptoms.
If you suffer from fragrance sensitivity, the best way to prevent scent-related headaches is to avoid strong scents as much as possible. You can also try to minimize your exposure to scents or components that can potentially irritate you. If you get a headache, you can treat it like any other headache with over-the-counter pain relievers such as ibuprofen or acetaminophen.
