Is it normal that I am losing hair everyday?
每天都有掉髮是否正常？
It is normal to shed between 50 to 100 hairs per day. This is because of the hair’s growth cycle, which consists of 3 phases: anagen, catagen and telogen. The anagen phase is the growth phase of the hair in which the hair is actively growing. This phase usually lasts 2 to 7 years, and normally 85-90% of scalp hairs are in this phase at any given time. The catagen phase is known as the transition phase in which hair shaft production is completed. The telogen phase, otherwise known as the rest phase, is the last phase of the growth cycle. In this phase, a club hair is fully formed resulting in a hard, white and dry material at the root and the hair is eventually shed from the scalp.
Those with Androgenetic Alopecia, hair shedding is in excess of 100 hairs per day, as follicular miniaturisation causes the hair’s growth cycle to become progressively shorter. This results in significantly less hairs in the anagen phase at any given time, which is why hair shedding is more frequent in those with Androgenetic Alopecia.
每天掉髮50至100根是正常現象，因為頭髮的生長周期分為三個階段：生長期、退化期與生長靜止期。生長期的頭髮會活躍生長，此階段通常維持2至7年，一般情況下，頭皮上85-90%的頭髮都是處於此階段。退化期是過渡期，髮幹生產在此階段完成。生長靜止期階段也稱休止期，是增長周期的最後一個階段。頭髮在此階段已茂盛形成，髮根可以看到白色、乾燥和硬身的物質，而頭髮最後會從頭皮脫落。
雄激素性脫髮症患者每天最少掉髮100根。毛囊縮小令頭髮增長周期逐步縮短，最後大幅減少生長期的頭髮，所以患者掉髮明顯較為頻密。