From the medical and physiological point of view, the human body is a unity. When there are emotional fluctuations such as impatience, excitement, anxiety and depression, the functions of endocrine and nervous system will be disordered, which will cause the contraction and relaxation balance of microvessels densely covered on the skin surface. Especially when the mood changes suddenly, the nerve endings will release a large amount of acetylcholine, which will dilate the skin blood vessels, thus causing pathological reactions in the skin and hair.
Question 2: Is there such a thing as growing old overnight? What is the reason? There is indeed a profound correlation between stress and hair. When people are stressed, the capillaries of the scalp will continue to contract, which leads to the low function of hair mother cells, and the ability of melanocytes to produce melanin will also decrease. The reduction of melanin will directly lead to the generation of white hair, which is why people who are worried are prone to grow white hair.
But this is a gradual process, and the hair will turn white from the root, so it is impossible for the hair that has grown to turn white overnight.
As mentioned above, white hair is caused by the decline of the functions of melanocytes and pigment stem cells, and the inability of melanin to adhere to hair. Hair originally grown as black hair, even if melanin discolors, is extremely weak, almost imperceptible to the naked eye, and does not completely turn white.
Question 3: Is it possible to "grow old overnight"? First of all, "grow old overnight" is a rhetorical device. One night is not an exact number, and it is probably exaggerated.
The color of the hair will hardly change, and it will not change without strong external physical and chemical effects.
After reading some articles that are not too serious and formal, I can sum up the following opinions:
The hair suddenly turned white within a few hours. At present, there are the following possible direct reasons:
1, deliberately dyed white
2, the original dyed black faded
3. In a short period of time, the black hair fell much more than the white hair, causing the overall hair color to turn gray.
4. I forgot to dye my hair.
5. There is no condition to dye your hair in prison or under other circumstances. In particular, China's * * * system currently advocates younger officials, and senior officials have to dye their hair to show that they are young. Once they are in prison, they have no conditions to dye their hair.
6. Observed just noticeable difference problem: It is not necessary for all the hair to turn white and gray as a whole. As long as the proportion of white hair is higher than before, the color change of hair can be observed.
7. The observer's subjective observation bias, memory errors, memory modification under cultural cues (some people answered that the so-called collective unconsciousness), and deliberately exaggerating what he observed (in fact, the hair has long been white, and I didn't notice it before, but suddenly found the change of hair color after encountering a stress event).
A common cause of acute gray hair is diseases, including two diseases, Alopecia areata and Vitiligo. The case reported by Ephraim in 1959 was vitiligo. The patient had a sudden white hair after an industrial accident, and vitiligo lesions were found in other parts of the body one and a half years later, which confirmed that the patient had vitiligo on the scalp for the first time and caused acute white hair. Vitiligo damages melanocytes, either dysfunction or death of melanocytes, which will involve other parts of the skin outside hair follicles. Clinically, large white spots are seen on the skin, and the skin involved is highly sensitive to sunlight due to the loss of pigment protection.
Alopecia areata, commonly known as ghost shaving, has no difference in attacking pigment cells when vitiligo involves the skin. Alopecia areata only involves hair follicles, but it affects the function of keratinocytes. Alopecia areata is sometimes accompanied by finger (toe) nail involvement. In alopecia areata, there is a diffuse type, which only attacks hair follicles that can produce pigment, causing patients to lose a lot of black hair, while the white hair is preserved. If patients have a small part of white hair before, then suddenly diffuse alopecia areata and a lot of black hair fall, the result is self-evident, that is, all hair is white overnight. Alopecia areata can heal itself, the hair follicles are activated again, and the new hair grows white. Therefore, this sudden white hair is irreversible, and patients are often impressed, and the story of white hair will spread overnight.
Vitiligo and alopecia areata are both autoimmune diseases, which are the result of immune attacks on pigment cells and hair follicles, and can also be caused by emotional trauma and depression. Therefore, the story of some people's white hair overnight in history should be the result of such diseases. Most of them may take weeks or even months to cause the effect of white hair, especially vitiligo, which will take at least three or four months to have an effect. The shorter it takes, the more likely it is caused by alopecia areata. Diffuse alopecia areata selectively attacks black hair, which can cause white hair overnight.
Some mammals use hair for camouflage, such as Shorttail Weasel, which has two names in English. Ermine is Stoat, and if it is stoat, it is brown stoat. After covering the ground with two or three centimeters of white snow for more than a month, it will change from brown ferret to stoat. Because the whole process is regulated by hypothalamus, it will affect gonads and be accompanied by testicular degeneration. In 1953, a 40-year-old miner foreman was hospitalized for stone-end disease, and there was a minor accident that day, but he went to the scene to deal with it afterwards. Soon he fainted for about half an hour. After one day, his hair turned white, and almost all other parts of his hair turned white gradually, even his pupils turned white and his testicles degenerated, acting almost like a short-tailed ferret. Later, he was diagnosed with hypothalamic damage.
One-night gray hair is a rare phenomenon. Because of its shocking effect on bystanders and parties, related stories are easy to be recorded and spread, and the facts are exaggerated because of this shock. However, there are medical and social reasons behind it. In extreme cases, one-night gray hair may appear in a strict sense, but most stories may span weeks or even months. In view of this phenomenon, doctors should seek the medical reasons behind it, instead of misdiagnosing and mistreating it as nonsense, so as to avoid questioning others' integrity and further causing emotional trauma. ...> >
Question 4: What's wrong with white hair overnight? Maybe the title and content are inconsistent ... Hair is black because there is melanin when it is generated, and it turns white because of the role of genes and environment, and melanin is gradually decreasing. It is a gradual process. If you cut your hair, it won't turn white if you leave it for a long time. "White hair overnight" means that the human body actively absorbs the melanin in the hair back ... impossible.
Question 5: Can people really grow old overnight? A: Yes, it's something that can't be expressed in words, which leads to growing old overnight.
Question 6: What happened to the 36-year-old mother's gray hair overnight? In Anshun, Guizhou, there is a young mother with white hair. 20 1 1 year, 12-year-old son had a car accident, and the 36-year-old mother turned all blue in less than a month because of excessive anxiety. What is even more touching is that with the unremitting efforts of this white-haired mother, her son, who has been in a vegetative state, was finally awakened after four and a half months of the car accident.
The mother's name is Sun Yuantao, and she looks about 50 years old last year. She has long hair, but she is obviously oily. The part nearly 20 cm long above the hair root is all white hair, and then it is chestnut with H. Surprisingly, the ID card shows that she is not yet 36 years old. It is understood that Sun Yuantao and her husband Zeng Xinlin are from Xinhua County, Hunan Province. They have been working in Changsha for more than ten years. In March last year, the couple came to the west route of Anshun Development Zone and opened a typing and copying shop. In July last year, they took 12-year-old son Ceng Shan from his hometown to Anshun and entered Anshun No.6 Middle School to study in Grade One.
Last year 1 February1at about 6: 40 in the morning, 12-year-old Ceng Shan went to school as usual. When passing through the vocational middle school section of the west route, he was suddenly knocked down by a car and was unconscious on the spot. After being sent to the hospital, Ceng Shan was diagnosed with closed craniocerebral injury (especially severe). The doctor gave a critical notice and told Sun Yuantao that his son Ceng Shan could die at any time. After entering the intensive care unit, the doctor cut the trachea for Ceng Shan to help him breathe.
After more than a month, my son was finally out of danger and his vital signs returned to normal, but he became a vegetable. At this time, Sun Yuantao's hair has all turned white. She still insists on calling her son's name and talking to him every day. The miracle happened at this moment. See Ceng Shan head side to the right. Sun Yuantao stared at his son excitedly and asked, "Ceng Shan, do you know me?" Ceng Shan nodded his head. There was a sigh in the ward. When doctors heard that Ceng Shan was conscious, they all called it a miracle. Sun Yuantao said that as long as her son can be cured, her hair will turn white, and she doesn't care.
Question 7: Is there any way to dye your hair overnight? Haha.
Most of the yellow people's hair is dark brown, however, some factors will lead to hair whitening, some of which are manifested as all hair whitening, and some are only local hair whitening. There are many reasons for hair turning white, including congenital factors and acquired factors.
Congenital gray hair is seen in albinism and ataxia. This kind of white hair is caused by autosomal dominant inheritance, which often has a family history of several generations. At present, there is no effective treatment for this kind of white hair.
Acquired gray hair, some are physiological phenomena, others are related to other factors. For example, normal people begin to have white hair at the age of 35, and it gradually increases with age, which is a phenomenon of aging; Some people have white hair around the age of 20, which is called juvenile white, and it may also be related to heredity; Sorrow, anxiety, tension, fear. Excessive fatigue and other factors can cause scalp capillary spasm, hair melanin production obstacles, so there are a lot of white hair; Atherosclerosis, autoimmune diseases, pernicious anemia, hyperthyroidism, coronary heart disease, myocardial infarction and essential hypertension are all prone to gray hair. In addition, the hair in the lesion area of leukorrhagia and the newly grown hair of alopecia areata will also turn white, which is because the tyrosinase activity of melanocytes in the hair bulb is reduced or lost, and melanin cannot be produced, resulting in the lack of pigment and whitening of hair; Some nutrients are deficient, especially copper, vitamin B 1, vitamin B2, pantothenic acid, etc., and hair may turn white.
After discovering white hair, we should first find out the cause, and if it is caused by disease, we must treat it in time. Keeping a happy spirit, paying attention to combining work and rest, eating more beans, vegetables and pig liver (with high copper content), supplementing vitamin B, and taking Polygonum multiflorum Thunb tablets all have certain effects on increasing hair pigment.
Question 8: Can people really grow old overnight? Once a person is hit hard and disheartened, he loses the hope of survival. Although he may not have a bald head, he should have died more than half. A person who has no hope and is disheartened is like an old man with white hair, and his life is not long ~ ~ ~
Question 9: What's the matter with growing old overnight? 1. When you feel pressure, your muscles will be tense and stiff, and your blood vessels will contract, which will slow down the blood delivery. Take a warm bath to relax before going to bed, or watch an interesting movie, and regularly let off unpleasant feelings. Don't let the pressure overwhelm you.
2. Deficiency of qi and blood Chinese medicine believes that one of the main reasons for hair whitening is deficiency of qi and blood. Hair is an important manifestation of qi and blood in the body. Black, thick, supple and bright hair represents sufficient qi and blood. White hair, hair loss and dry hair are all manifestations of women's lack of qi and blood.
Question 10: What's the matter with growing old overnight? One night hoary head
Is to use your brain too much
Will be anxious