One of my eyelashes will turn white and become very long after a while. Why? Does this affect health?

Eyelashes are black because hair contains a kind of melanin. The more melanin, the darker the eyelashes. Conversely, the less melanin content, the lighter eyelash color. With the aging of human body, the pigment cells in hair follicles will stop producing melanin and eyelashes will turn white. The human body has no glands that secrete melanin evenly. Melanin is produced separately in each eyelash, so eyelashes always turn white one by one. It usually takes many years for eyelashes to turn white, but there are a few rare diseases that can make people turn white overnight. The main causes of eyelash whitening are heredity and aging. Anxiety, sadness, mental stimulation and some disease factors will make the formation of melanin difficult. There is another situation: melanin has been formed, but it can not be transported to the root of eyelashes, so that the melanin contained in eyelashes is reduced, so that eyelashes will turn white day by day. I suggest you'd better ask a doctor! I wish you get rid of this trouble as soon as possible! ~