脱发和掉发如何区分 黄进华 中南大学湘雅三医院

脱发和掉发如何区分 黄进华 中南大学湘雅三医院
脱发应该是病理性的脱发，而所谓的掉发应该是生理性的掉发。正常情况下头发属于三个时期，主要是生长期，绝大部分的头发也就是85%以上的头发，是处在生长期，另外有15%的头发属于退行期和休止期，所以在休止期退行期的头发是可以脱落的，这个时期的脱落不超过70～100根，这个情况叫做心理性脱发，也就是通常讲的掉发；脱发是病理性的，脱发的数量大于每天100根，由于长期大量的脱发会逐步导致头发的稀疏，甚至脱发，所以脱发是病理状态，而掉发常常是生理状态。

How to distinguish hair loss from hair loss
Hair loss should be pathological, The so-called hair loss should be physiological hair loss. Under normal circumstances, hair belongs to three periods, Mainly in the growth period, Most hair is more than 85%, It's growing, In addition, 15% of the hair belongs to retrograde period and rest period, So hair can fall off during the rest period, During this period, the number of abscission is no more than 70-100, This is called psychogenic alopecia, That is to say, hair loss; Hair loss is pathological, The number of hair loss is more than 100 per day, As a result of long-term large amount of hair loss will gradually lead to hair thinning, Even hair loss, So hair loss is pathological, And hair loss is often a physiological state.