The causes of gray hair [http://www.toufa5.com/baitoufa/baitoufadeyuanyin/557.html] can be divided into congenital and acquired factors. Among the acquired factors, there are several reasons: nutritional deficiencies, long-term mental stress, and insufficient sunlight exposure. Weak kidney function is another factor. Additionally, some skin diseases such as vitiligo can also cause gray hair. Normally, people start to develop gray hair around the age of 35. If it appears earlier, it's best to seek treatment. According to Professor Hou, congenital genetic gray hair is difficult to treat, but gray hair caused by acquired factors can be improved with treatment.
Gray hair refers to hair that has completely or partially turned white, which can be categorized into congenital and acquired types. Congenital gray hair often has a family history and is more commonly seen in localized areas, particularly at the front hairline. Acquired gray hair includes both elderly gray hair and premature gray hair. Some elderly individuals who are physically weak may have very few gray hairs. Premature gray hair occurs in children and teenagers and often has a family history. Besides an increase in gray hair, it does not affect overall health. Sudden onset of gray hair during adolescence may be related to nutritional disorders. Psychological factors can influence hair turning white. Gray hair can also be a symptom of certain diseases such as progeria and vitiligo. Currently, there is no effective therapy for treating gray hair [http://www.toufa5.com]. It is important to help patients correctly deal with the condition, avoiding mental tension and depression. Hair dye is a common cosmetic used by those with gray hair, but it can cause allergic dermatitis, so it should be used cautiously.
1. Psychological Factors
If a person is consistently depressed, stressed, or overworked, it can lead to hair turning from black to white. For instance, during the Spring and Autumn period of ancient China, Wu Zixu, a doctor of the Wu State, experienced his hair turning completely white overnight in order to pass through the Zhao Pass; In Victor Hugo's *Les Misérables*, the mayor of Utrecht experiences intense and painful mental conflict before deciding to admit he is the prisoner in court, [his graying hair turned completely white within an hour]. Whether historical legends or literary descriptions, although somewhat exaggerated, they clearly show that people have long believed that hair turning from black to white is related to psychological factors.
2. Poor Nutrition
Hair is an appendage of the skin, just like other organs and tissues in the body, requiring adequate nutrition. Different races have different hair colors. Caucasians have golden hair, while Asians, due to the copper, cobalt, and iron content in the pigment granules of their hair, have brown-black hair. If the diet lacks these minerals—copper, cobalt, and iron—it will naturally affect melanin synthesis, causing hair to turn from black to white. Furthermore, medical clinical observations have proven that long-term deficiencies in protein, plant oil, vitamin B1, vitamin B2, and vitamin B6 can also lead to hair turning from black to white.
3. Diseases, Medications, and Genetics
Diseases, medications, and genetics are also factors leading to hair turning from black to white. Disorders such as decreased pituitary function, hyperthyroidism, tuberculosis, typhoid fever, pernicious anemia, and vegetative nerve dysfunction are all diseases found to be related to hair turning from black to white. Related articles: Secrets and techniques for maintaining good hair quality, professional advice for restoring your flowing locks, and the treatment of gray hair through "tapping the gallbladder meridian."