Mason Delacroix
Alcohol is known to give people a warm or hot sensation when swallowed. This is caused by ethanol, the primary alcohol found in drinks, which makes the body's heat receptors more sensitive to heat. This results in a burning sensation in the throat and chest, similar to that of spicy food. Additionally, alcohol dilates blood vessels, increasing blood flow to the skin and causing a flushed, warm feeling. While this process makes the skin feel warmer, it is actually the body's way of cooling down. As a result, people who are drunk are at risk of hypothermia as their core body temperature may be decreasing.
| Characteristics | Values |
|---|---|
| Alcohol consumption affects the body's ability to | Regulate body temperature |
| Dilate blood vessels | |
| Increase heart rate | |
| Release histamine | |
| Trigger heat receptors | |
| Increase blood flow | |
| Cause flushing | |
| Cause sweating | |
| Cause hot flashes | |
| Cause alcohol flush (Asian flush) | |
| Cause alcohol withdrawal | |
| Cause hypothermia |
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What You'll Learn
- Alcohol widens blood vessels, increasing blood flow to the skin
- Ethanol in alcohol turns to gas, triggering heat receptors in the trachea and lungs
- Alcohol can cause a histamine reaction, similar to an allergic response
- Alcohol can speed up heart rate, causing a flushed, hot feeling
- Alcohol can cause hot flashes during hangovers and withdrawal
Alcohol widens blood vessels, increasing blood flow to the skin
Alcohol consumption affects your ability to regulate your body temperature. It also dilates blood vessels, which contributes to feelings of warmth. This phenomenon is called vasodilation, where blood vessels widen, increasing blood flow to the skin.
When you drink alcohol, your blood vessels dilate to get rid of excess heat. As the vessels expand, you might feel warmer because of the increased blood flow in the vessels under your skin. This process makes the skin feel warmer, but the widening of blood vessels is the body's way of cooling itself down after alcohol consumption. The skin feels warm after drinking alcohol because your body is trying to push the heat out.
The ethanol in alcohol boils at 173˚F/78.3˚C, which is significantly below the temperature of water (212˚F/100˚C). When ethanol is in your mouth at 98.6˚F/37˚C, some molecules will be vaporized and turned into a gas. These molecules can be inhaled and trigger heat receptors in your trachea and lungs. With high-proof alcohols, you will likely feel warmth not just in your throat but also in your chest (lungs).
Alcohol also makes the heat receptors in your body more sensitive to heat. Normally, these heat receptors are activated at about 107˚F/41.6˚C, but alcohol lowers this threshold to about 93˚F/33.9˚C. Since the normal human body temperature is 98.6˚F/37˚C, when you drink alcohol, it is your own body heat that activates the heat receptors.
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Ethanol in alcohol turns to gas, triggering heat receptors in the trachea and lungs
Alcoholic drinks often feel hot when swallowed due to the presence of ethanol. Ethanol has a boiling point of 78.3°C (173°F), which is significantly lower than that of water. Consequently, when ethanol is in the mouth at the average human body temperature of 37°C (98.6°F), some ethanol molecules will vaporize and turn into gas. This gas is then inhaled, triggering heat receptors in the trachea and lungs.
The phenomenon is known as the “burning” sensation commonly associated with high-alcohol beverages. It is important to note that this sensation is not caused by the alcohol burning or damaging the tissues in the mouth or throat. Rather, it is the result of the ethanol molecules transforming into gas and activating heat receptors.
The degree of warmth felt is dependent on the concentration of alcohol. Higher alcohol concentrations will affect a greater number of heat receptors, resulting in a more intense sensation of warmth. Additionally, ethanol lowers the activation temperature of these receptors, making them more sensitive to heat. Normally, these receptors would activate at around 41.6°C (107°F), but in the presence of ethanol, they activate at approximately 33.9°C (93°F).
The sensation of warmth from drinking alcohol is not limited to the throat and chest area. Alcohol is a vasodilator, causing blood vessels to widen and increasing blood flow, particularly near the skin. This increased blood flow leads to a sensation of warmth and can result in flushed skin. However, while the skin feels warmer, the body is actually losing heat, and the widening of blood vessels is the body's attempt to cool down. This is why drunk individuals are at a higher risk of hypothermia, despite feeling warm.
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Alcohol can cause a histamine reaction, similar to an allergic response
The histamine reaction to alcohol can be understood as an immune response. The body perceives certain ingredients in alcoholic beverages, such as grains or acetaldehyde, as threats. This triggers an allergic reaction similar to the response against viruses or bacteria. Histamine, a chemical released by the immune system, causes the intense sensation of warmth associated with alcohol flush.
It is important to distinguish between alcohol allergies and alcohol intolerances. A true allergy to alcohol is rare, and symptoms such as difficulty breathing and abdominal pain would likely deter further consumption. Intolerances are more common and are characterised by the body's inability to metabolise alcohol efficiently, often due to insufficient DAO levels or histamine intolerance. This results in adverse reactions, including the release of histamines, which can further complicate the body's response to alcohol.
While alcohol does not raise internal body temperature, it affects the body's ability to regulate temperature and dilates blood vessels, contributing to feelings of warmth. Ethanol, a component of alcohol, also lowers the activation temperature of heat receptors, making them more sensitive to heat. This explains why consuming alcohol can lead to sensations of warmth in the throat, chest, and lungs.
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Alcohol can speed up heart rate, causing a flushed, hot feeling
Alcohol can speed up your heart rate and cause a flushed, hot feeling. This is because it is a vasodilator, which means it widens blood vessels, allowing more blood to flow. This process is called vasodilation. When the vessels expand, you might feel warmer due to the increased blood flow in the vessels under your skin. This process makes the skin feel warmer, but it is actually the body's way of cooling itself down after drinking alcohol.
The ethanol in alcohol boils at 173˚F/78.3˚C, which is significantly below the temperature of water (212˚F/100˚C). This means that when ethanol is in your mouth at 98.6˚F/37˚C (human body temperature), some molecules will turn into gas. These molecules can be inhaled and trigger heat receptors in your trachea and lungs. This is why you might feel warmth in your chest (lungs) and throat when drinking high-ABV alcohol.
The degree of temperature can also affect the number of receptors activated. The higher the alcohol content, the greater the number of heat receptors that will be affected. This is why you might feel a burning sensation when drinking alcohol. However, it is important to note that alcohol can lower your core body temperature, making you feel colder. This is why people who are drunk are at risk of hypothermia.
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Alcohol can cause hot flashes during hangovers and withdrawal
Alcohol can have a significant impact on the body's temperature regulation, and this is noticeable both when we consume alcohol and also during the hangover or withdrawal phase. When we drink alcohol, it can often feel like our mouths are experiencing a warm or even hot sensation. This is because alcohol is a vasodilator, meaning it causes blood vessels to relax and widen. As a result, there is increased blood flow, which can lead to a feeling of warmth or even flushing of the skin. This is particularly noticeable in the face and neck areas, and for some people, it can be an uncomfortable sensation. The burning sensation when swallowing alcohol is due to the alcohol coming into contact with sensitive nerve endings in the mouth and throat. These nerve endings detect temperature and pain, and the high proof alcohol can stimulate them, creating a feeling of warmth and sometimes even pain.
The hot sensation from alcohol is often more noticeable in stronger drinks with higher alcohol content, and it is why some people prefer to mix their spirits with cooler mixers or ice to reduce this effect. However, it is not just the act of drinking alcohol that can cause hot flashes; the hangover or withdrawal phase can also result in similar sensations. During a hangover, when the body is processing and recovering from the effects of alcohol, it is common to experience hot flashes and sweating. This is again due to the way alcohol interacts with the body's temperature regulation. The body's temperature can fluctuate during a hangover, and as it tries to restore balance, hot flashes and cold spells can occur.
Withdrawal symptoms from alcohol can also include hot flashes, particularly in those who regularly consume large amounts of alcohol. When the body is used to having a certain level of alcohol in the system and this is then removed, it can cause a rebound effect, including hot flashes and night sweats. These symptoms are often part of the detox process and can be very uncomfortable for the individual. It is the body's way of trying to restore balance and regulate temperature, and it is a sign that the body is working to rid itself of the toxins associated with alcohol. In addition to hot flashes, other common withdrawal symptoms include shaking, nausea, headache, and fatigue.
For some people, the experience of hot flashes during a hangover or withdrawal can be very intense and uncomfortable. It is important to stay hydrated during this time, as the body is working hard to process the alcohol and restore balance. Drinking water can help to regulate body temperature and also replace any fluids lost through sweating. It is also advisable to avoid caffeine and sugary drinks, as these can disrupt the body's temperature further and make the hot flashes worse. Instead, opt for cool, refreshing drinks and light, healthy foods to help the body recover. Finally, rest is crucial during this time, as the body needs time to heal and recover from the effects of alcohol.
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Frequently asked questions
Alcohol trips the same heat receptors as spicy food, but in a different way. Capsaicin, the chemical in chilli peppers, interacts directly with the heat receptor, mimicking a high-temperature food or drink. Ethanol, on the other hand, makes the receptors more sensitive to heat, so they turn on at a lower temperature. This is why you feel a warming sensation when drinking alcohol.
Alcohol is a vasodilator, meaning it increases blood flow, especially in the blood vessels near the skin. This causes a warming sensation as the blood is diverted from your core, and your body temperature may actually be lowering.
During a hangover, your body temperature rises from the low temperature you probably experienced while you were intoxicated. Your body temperature may continue to rise, along with excessive sweating, as your body's fight-or-flight response is triggered.
Some people experience alcohol flush, also known as Asian flush or flushing syndrome, due to a genetic mutation affecting how their body metabolises alcohol. This leads to a buildup of acetaldehyde, a toxic byproduct of alcohol, which causes an intense sensation of warmth and flushed skin.
Alcohol can hinder the part of the brain that senses and controls body temperature, which can fool you into feeling warmer than you are. This can be dangerous in extreme cold as it increases the risk of hypothermia.
