Why do I sometimes get goosebumps even if it s not cold?

Goosebumps are mainly a role in maintaining body temperature, and when people encounter cold, fear, excitement, and nervousness, the related sympathetic nerves produce a role.

This is because goosebumps change with people's physiology, and they are all regulated by human nerves.

I think it's a normal physiological reaction, and sometimes I get goosebumps when I'm nervous or scared.

Goosebumps don't just happen when your body temperature drops instantaneously, they can also get goosebumps when you're scared.

The body hair of all mammals automatically stands up when cold, creating a layer of fluffy warmth. When we feel cold, the muscles around the hair follicles contract – a reflex left by our ancestors when they grew long body hair. But since we don't have much body hair, we can only see goosebumps on the **.

Goosebumps are a physiological phenomenon inherited from our animal ancestors that works for them but doesn't help us much. Goosebumps are tiny bumps, similar to poultry after feathers have been plucked. These lumps are caused by contractions of the tiny muscles attached to each hair.

Each contracted muscle creates a shallow depression in the surface, causing the surrounding area to protrude. Whenever the body feels cold, the contraction can also make the hair stand on end. In animals with thick fur, this rise in hair expands the layer of air that acts as an insulator.

The thicker the hair layer, the more heat is retained.

In addition to the cold, many animals have their fur standing on end when they feel threatened – for example, a cat is attacked by a dog. The tall fur, combined with the arched back and the sideways posture that the animal often takes, makes the cat look bigger, trying to make the dog flinch. People also experience goosebumps in emotional situations, such as walking down the aisle during a wedding, standing on the podium listening to the national anthem after winning a sports competition, or even just watching a horror movie on TV.

Many times, a person may get goosebumps years after a major event, simply by thinking about the emotions she once experienced, perhaps while listening to a romantic song she danced with the love of her life years ago.

The reason for all these reactions is the subconscious release of a stress hormone called adrenaline. Adrenaline is produced by two small bean-shaped glands located at the top of the kidneys, and it not only causes muscle contractions, but also affects many other body reactions. In animals, this hormone is released when the animal is cold or under stress, preparing the animal for an escape or fight response.

In humans, adrenaline is usually released when we feel cold or scared, but adrenaline is also released if we are under stress and feel strong emotions, such as anger or excitement. Other signs of adrenaline release include watery eyes, sweaty palms, trembling hands, increased blood pressure, a racing heartbeat, or a "butterfly" sensation in the stomach.

Because the weather is very cold, our body will have some reactions, and at this time there are some tissues in the body that will have a very obvious reaction.

Because when our brain feels the cold outside, the sympathetic nerve will act and pull the erector pili muscles on the body to contract, so goosebumps will appear.

1. Goosebumps are a unique physiological phenomenon of homeothermic animals to preserve a certain body temperature, when the brain senses the cold, nervous or terrifying, the sympathetic nervous system that works when nervous and excited has a role. The erection tendons that pull the body hair shrink, which leads to goosebumps.

2. Lizen takes the hair tendon near the root of the body hair, and as soon as it shrinks the usual horizontal body hair, it stands up, and the periphery of the hair root is raised, forming a pimple shape like a bird. After goosebumps, in addition to muscle contraction to generate heat, closing pores also has the effect of keeping out the cold. After the animal with long body hair erects body hair, the gap between the body hair is conducive to heat preservation, 3, people not only get goosebumps when they are cold, sometimes they hear the harsh sound of the state attacking, and when they see disgusting and afraid things, the hair will also stand up, and a layer of goosebumps will rise on the body.

In the cold, the blood vessels in the human body constrict, so that the blood flow decreases, and at the same time, "goosebumps" appear, which is caused by the contraction of the erector hair muscle inside, and the sweat secreted by the sweat glands on the body decreases to prevent evaporation from taking away the heat, thereby reducing the amount of heat dissipation.

If in a cold environment, the cold receptors in the body will become excited when they feel the change in external temperature, and this excitement will be transmitted to the hypothalamus through the afferent nerves, and the thermoregulatory center inside the hypothalamus will also be excited, and the information to cope with the cold will be transmitted through the efferent nerves to the relevant parts that control heat production in the body, and they will respond quickly.

For example, "shivering" is an important structure for heat production, and "skeletal muscle" involuntarily trembles and increases heat production. In addition, the thyroid gland and adrenal glands also feel the "command" and secrete thyroid hormones and adrenaline, which act on the cells, promote cell metabolism, and also increase heat production.

In addition to this, the body also needs to reduce heat dissipation. It is the main heat dissipation organ, and the heat dissipation mechanism is mainly vascular movement and sweat gland activity. As a result, the blood vessels in the human body constrict when it is cold, reducing blood flow.

Goosebumps, also known as keratosis pilaris, are generally hereditary, neither painful nor itchy, let alone pathological, but not good-looking, for people who love beauty, it is terrible. There is no ** way to do it yet, but it can be improved.

If you want to get rid of it, daily care is still very important.

More vitamin A supplementation is needed. For example, you can eat more foods rich in vitamin A, such as cod liver oil, eggs, carrots, sweet potatoes, peppers, mangoes, persimmons, etc.

Applying exfoliating cream can reduce symptoms 2 times a day for 2 months.

In addition, chickens must pay attention to hydration and moisturization, do not overbathe, and keep the water used in bathing at 41 degrees.

Precautions: In daily life, do not scratch with your hands** casually, so as not to cause pigmentation.

When cold air invades the surface of the human body, the temperature receptors on the surface immediately transmit the message to the brain. The brain is like a commander who issues an order to contract the sweat pores on the **, so the erector hair muscles under the hair begin to contract, and the hair stands up one by one, and the contracted erector hair muscles look like small bumps.

Why do we get goosebumps when it's cold?

This is the self-protection function of **.

When the weather is cold or when there is a sudden cool breeze, there will be some dense small bumps on our **, which looks like goosebumps that have been removed, so people call it "goosebumps". So how do goosebumps come about?

It turns out that there is a small bundle of tissue called the erector hair muscle attached to the human hair, which controls the movement of the hair. When cold air invades the surface of the human body, the temperature receptors on the surface immediately transmit the message to the brain. The brain, like a commander, issues orders, shrinking the pores of sweat on the **.

As a result, the erector hair muscles under the hair begin to contract, and the hair stands on end. The contraction of the erector hair muscles looks like small bumps, which can effectively prevent the loss of heat in the body, which is a self-defense response of the human body to resist cold. That's when you should consider adding some clothing.

Sometimes, when people are frightened, they will also have "goosebumps", which is caused by a chain reaction of self-defense nerves.

When cold air invades the surface of the human body, the temperature receptors on the surface immediately transmit the message to the brain. The brain is like a commander who issues an order to contract the sweat pores on the **, so the erector hair muscles under the hair begin to contract, and the hair stands up one by one, and the contracted erector hair muscles look like small bumps.

When the human body feels cold or scared, or when the brain commands, goosebumps will appear on the body.

Guidance: Pay attention to moisturizing and exfoliate once a month.

Exercise every day.

Eat more fruits and vegetables with vitamin A.

You can also use keratin soothing cream to improve, and you can use it for about a month, but this can't be **, so the care should be done well.

Why do we get goosebumps when it's cold?

Perhaps everyone has felt that when a cold wind blows or the ambient temperature is low, people will always involuntarily get goosebumps, and the hairs on the surface will also stand up one by one. What is the reason for this peculiar physiological phenomenon? How does it work?

Let's give you a popular science.

Because when people are cold, the body heat is not enough, and the pores will close to conserve the heat in our body, which is a normal physiological function.

According to Yasuo Kitajima, a Japanese expert in science, it is because when people perceive cold, nervousness or horror in the brain, the sympathetic nerves that work during tension and excitement have an effect, which causes goosebumps to appear.

A small bundle of tissue called erect hair is attached to the hair of the human **, it controls the movement of the hair, and when the cold air invades the surface of the human body, the receptor nerves on the surface immediately transmit the information to the brain, and the brain is like a commander, giving commands to contract the sweat pores on the **. Therefore, the vertical hair muscles under the hair begin to contract, and the hairs stand up one by one, and the contracted erector muscles look like a small lump, which can effectively prevent the loss of heat in the body, which is a self-defense response of the human body to cold.

Goosebumps are actually medically known as keratosis pilaris. The occurrence of keratosis pilaris is usually caused by genetic factors, that is, genetic factors, and is accompanied by acquired factors. Since most of this disease is born with the symptoms of keratosis, coupled with acquired diet and local hygiene, as well as changes in lifestyle habits, it may lead to the aggravation of this goosebump, also known as keratosis pilaris.

Usually, keratosis pilaris can be relieved, but it is difficult to completely relieve.

When the erector pili muscle contracts, the hair stands upright on the skin surface, and the spindle muscle cells become elastic hard protein fibers at both the beginning and the end, which are inserted into the space between the muscle cells and are immobilized, forming the tendon junction. When the muscles are relaxed, the hair returns to its original place due to the elastic return of the surrounding dermis, and the elastic scleretin fibers surrounding the root sheath of the outer hair are firmly attached to the epidermal cells, which in fact have less elasticity and more tension.

The end of the muscle inserts into the tonic hair follicle, but the beginning of its subepidermis is not rigid, so when the erector pili muscle contracts, ** is twisted to produce a goosebumpy appearance. The activity of the erector pili muscle is innervated by the adrenergic sympathetic nervous system, and when mental and emotional changes such as fear and fear occur, the sympathetic nerve is excited, the adrenaline level increases, the erector pili muscle contracts, and the hair stands erect.

When cold air invades the surface of the human body, the temperature receptors on the surface immediately transmit the message to the brain. The brain is like a commander who issues an order to contract the sweat pores on the **, so the erector hair muscles under the hair begin to contract, and the hair stands up one by one, and the contracted erector hair muscles look like small bumps.

Most of the situations you are talking about arise when a person goes from a hot environment to a cold environment. This is a normal reaction of the human body to outside temperature. Here's how it works:

When the ambient temperature is too low, the body feels that the outside temperature is low, and will reflect the information to the autonomic nerve center, after analysis, the central nervous system will send instructions to the adrenal glands to produce adrenaline, and after being released into the blood, it will shrink the subcutaneous blood vessels, contract the sweat gland mouth, and reduce the blood flow through the surface of the ** to reduce the ** heat dissipation. At the same time as this process, the erector pili muscle contracts and the hairs stand on end, which causes goosebumps. If the temperature drops further, shivering occurs, which is an intermittent contraction of muscles to increase thermogenesis and maintain body temperature.

Plug the holes on the ** to prevent heat from evaporating.