Li Mengying, head of the Physical Examination Center of the First Affiliated Hospital of China Medical University, said that although it is rare for the elderly to have black hair, it is a normal physiological phenomenon and an external manifestation of the improvement of physical function and health level. Exercise is the source of life. Long-term physical exercise accelerates the metabolism of the body. Aunt Yin is cheerful and likes to eat coarse grains and vegetables, which greatly improves her internal environment, which is the main reason why her hair turns black. Qi Shoucheng, deputy secretary-general of Liaoning Folklore Society and a famous folklorist, said: "The statement that black hair is an ominous sign is groundless and purely superstitious. There is no relevant statement in folklore and customs, so we should be familiar with it correctly. " Zhang Sining, director of the Social Psychology Research Office of Liaoning Academy of Social Sciences, said: "When something unusual happens suddenly, without adequate psychological preparation, the elderly are prone to panic, confusion and incomprehension. Coupled with patients who have been ill for a long time, they are more worried about bad things happening. " Second, the old man's white hair turns black? -Baidu knows > health/medical care > 2006-9-26 09:58 The best answer has always been that people, especially the elderly, have dreams of rejuvenation. A 70-year-old woman is pregnant and a 90-year-old woman is menstruating again. In recent years, such things have come into people's sight from time to time all over the country. Recently, it was reported by the media that a 68-year-old man in Sichuan actually developed black hair and acne, and his skin obviously felt smoother than before. So, these so-called "rejuvenation" phenomena are just our wishful thinking, or are they really so? According to local media reports, Zhu Laohan's hair was basically white in his early forties, and it has been 28 years now. But at the end of June this year, when Zhu Laohan went to the barber's for a haircut, the barber Fu actually told him that he had black hair on his head, and it has continued to grow until now. Knowing that his hair is "rejuvenated", the old man pays more attention to the "strange image" that happened before. Zhu Laotou said that his skin used to be rough, but in the past four or five years, others found that his skin did not match his age and his skin was exceptionally smooth. What's even more surprising is that Zhu Laohan actually has acne on his face. The "signs" that only appear when teenagers grow up and develop now appear on Zhu Laohan's face. Therefore, the family said that Zhu Laohan was "rejuvenated". A 75-year-old woman in Beijing has black hair and a new tooth. At the same time, the reporter heard that there is also a famous "rejuvenation" old lady on Beijing College Road. After many twists and turns, the reporter found the 75-year-old Li Guihua. When I first met Li Guihua, she wore a dark green cheongsam with black hair. Compared with her age, she looks young. Li Guihua told reporters that she used to be a university teacher, and her hair turned white within two years after her retirement. As she grew older, many teeth fell out of her mouth, and later she had to install a pair of false teeth. However, since she joined the old model association organized by the school the year before last, some strange changes have taken place in her body. She used to let her daughter dye her hair once before every performance, but one day when she was about to dye her hair, her daughter told her that black hair had grown at the root of her white hair. At that time, she didn't care. Unexpectedly, after a few months, there were more and more black hairs, and now there are few white hairs on Li Guihua's head. "What's even more surprising is that I have teeth again." Li Guihua said that at the beginning of this year, she had been feeling toothache. At first, she thought she was getting angry, but taking many medicines didn't help, and her teeth still hurt. Once, she wore false teeth before eating and suddenly felt very uncomfortable. She always felt that something was propped up. After I took off my false teeth, I licked it in my mouth with my tongue, and suddenly I felt something hard at the back molar. Li Guihua hurried to the mirror, only to see a new tooth growing on his gum. Not only that, Li Yuhua said, in the past, her leg was arthritic, and when she bent her leg, she always made a "click". Recently, however, her legs moved again, so she stopped ringing and walked more briskly than before. Li Guihua's series of physical changes not only surprised her family, but even her neighbors said that she was "rejuvenated" and asked her for health secrets. "I don't have any secret recipe for staying healthy," Li Guihua said. I usually have dinner with my family. In addition to attending the activities of the school's old model association on time, I have to go out dancing every day, which is very busy. "But, could it be that I ate some estrogen last year?" Li Guihua guessed for himself, but he was not sure. It is hard to say why individual phenomena cannot be studied scientifically. It's amazing to face these "rejuvenated" old people. Can people's age really be reversed in some people? If we find the secret of their "rejuvenation", then each of us should be able to have such magical changes in our bodies. With these questions, the reporter found Professor Tong, an academician of China Academy of Sciences and Peking University Center for Aging Research. He told reporters that some elderly people do have such a situation, but the reason is still unclear. Academician Tong explained to reporters that in real life, some old people have black hair in their white heads, some have teeth, and even some old ladies have menstruated again after menopause for more than ten years. However, these people did not have a comprehensive physical examination, and compared these superficial changes with the endocrine indicators of the body to determine why the body has such changes. And it depends on whether this phenomenon is a local phenomenon or an overall change. Only the overall "rejuvenation" is worth studying. These individual phenomena of "rejuvenation" are a good scientific research topic. However, the number of cases is very small, which is difficult to collect and not enough for research. Even if found, it is difficult to compare his present situation with his past situation. These people and things are often fleeting like meteors. Although we have seen the phenomenon of "rejuvenation", we can't study it because of incomplete conditions, so the mechanism is not very clear. We can only guess that it is related to changes in people's mood, diet and endocrine. Human aging is an irreversible process, and taking hormones can only delay aging. "Human aging is an irreversible process, which can be delayed, but irreversible." Academician Tong said that science is developing, but now this statement cannot be overturned. Human aging is the whole aging process of the whole human body, such as respiratory system, cardiovascular system, endocrine system, nervous system and so on. Because aging causes changes in the body structure, which is irreversible. After puberty, after about 30 years old, people's physical function began to decline gradually and embarked on the process of aging. In this process, although various cell tissues of the human body are constantly updated, with the passage of time, the growth rate of new cells will gradually slow down, the number of old cells in the human body will increase, and people will move towards old age. Generally speaking, people's aging is that their hair turns white and their teeth fall off. However, the clinical identification of aging has biological quantitative indicators in nervous, cellular, respiratory and cardiovascular systems. After comprehensive evaluation, we can see how the human body is aging. Talking about some methods taken by some people to delay aging, such as taking hormones, Academician Tong said that after menopause, eating estrogen can enhance the level of estrogen, which will lead to menstruation. This is a man-made external force to push a system to get some changes, and it is hard to say how much effect it has on the whole. This can't be called "rejuvenation". And the current use of estrogen is controversial. Many researchers believe that estrogen can cause diseases such as breast cancer and reproductive system tumors. Doctor's opinion: Younger age may be a harbinger of some diseases. Zhao Guifang, director of the Department of Gynecology, Beijing Geriatric Hospital, told the reporter that the sudden appearance of "rejuvenation" may be a harbinger of some diseases and should be checked in the hospital in time. After 45-50 years old, women's ovarian function deteriorates, their response to follicle stimulating hormone and luteinizing hormone decreases, menstruation stops and they enter menopause. If menstruation suddenly appears for a long time after menopause, you must go to the hospital for examination, because it is likely that there is a malignant tumor in the uterus. Some elderly people's hair suddenly turns black, especially accompanied by skin tenderness and sexual hyperfunction, which is probably caused by pituitary abnormalities and lesions. The old man "grows new teeth" after losing his teeth. The most common cause of this phenomenon is gingival atrophy, which exposes redundant teeth or residual roots that were originally left in the gums. In addition, the sudden increase of appetite in the elderly may also be caused by abnormal thyroid hormone secretion or parasites in the body.