灰白发从中医理论来说,发为血之余,又发表于肾,所以说肾其华在发,当心肾不交(失眠、神经衰弱)时,或先天禀赋不足,或思虑过度耗伤精血,或担惊受怕伤肾精时,头发都会变白。正常情况下,40岁后都会长白发,这是因为随着年龄的增长,肾的精气逐渐衰减、肝血不足,不能很好地供养头发,就会出现白发。这属自然现象,也 Gray hair from the theory of traditional Chinese medicine, made for the blood, but also published in the kidney, so that its kidney in the hair, beware of kidney failure (insomnia, neurasthenia), or lack of natural endowment, or thought excessive wear and tear Blood, or scared injured kidney essence, the hair will turn white. Under normal circumstances, 40-year-old will be white hair, it is because with age, the essence of kidney gradually decayed, lack of blood, can not properly support the hair, there will be white hair. This is a natural phenomenon, too