Why Would a Single White Hair Appear on My Body?

The presence of a single white hair on the body is related to diet, lifestyle habits, and autoimmunity. It is normal to have only one very long white hair growing out without any other symptoms of discomfort, so don't worry too much. This is due to a lack of melanin in a certain hair follicle, which has no impact on physical health. You can eat foods with high melanin content, such as black sesame seeds and black beans, to observe the situation. If the skin is white in addition to the white hair, and the number of white hairs gradually increases, it is recommended to consider vitiligo or leukoderma. Since the affected area lacks melanin and has poor blood circulation, it cannot supply the necessary nutrients for hair growth. It is recommended to go to the hospital for skin CT or Wood's lamp examination for confirmation and targeted treatment. After the primary disease is cured, black hair will grow out. Regular local massage can help with disease recovery. The color of hair is determined by melanin. More melanin turns it black, less melanin gradually turns it from brown to golden yellow, and when melanin disappears, it turns white. The melanin in hair is produced by melanocytes located in the hair matrix, and the hair cells grow out with this melanin. When melanocytes are damaged, they turn white. This is the reason why gray hair appears after old age. Additionally, the luster of hair is related to the air trapped within it. The more air trapped, the more glossy and dazzling the hair appears.