最常見的脫髮是“雄性禿”，它會使你的頭髮逐漸稀疏，並最終產生脫髮。其最壞的情況是出現“普禿（全身毛髮均脫落）”，老年人的脫髮現象尚屬正常，但仍然有一些人在青年時候即產生了脫髮現象。
人們一般認為脫髮是因為來自母方的遺傳，但這方面遺傳影響的概率大概只有50%。事實上，引起脫髮的因素很多，比如你暴露在了化學物質、有毒物質中或者接受瞭如化療之類的特殊治療等。壓力方面的問題，如情緒創傷、沮喪也是引起脫髮的原因之一。
頭皮上過多的油脂分泌物以及不健康的飲食習慣和生活方式也肯能會引起脫髮，如果一個人長期食用高脂類食物，從中攝取大量的卡路里也肯能導致早期頭髮。
脫髮也可能是某些疾病症狀之一。這種類型的脫髮與普通由年齡增長引起脫髮有很大不同，也很少會是這類疾病先發或者唯一的表現症狀。會引起脫髮症狀的疾病通常有：甲狀腺機能減退、缺鐵、脂諡性皮炎和二期梅毒疹，這種由疾病引起的脫髮也會在這些疾病被治癒後消失，到時你的頭髮就會回到正常的生長狀態。
還有兩種類型的脫髮：牽引創傷性脫髮和拔毛髮症。牽引創傷性脫髮一般歸咎於頭髮受到過度和慢性的拉拔，在喜歡給自己頭髮編辮子或打結的人群中較常見。這也是為什麼部分錫克人常常會經歷脫髮的原因，他們終生不剪頭髮，成年錫克男子一般都將頭髮用布層層圍起，繞成一個像“大磨盤”的頭包，這種對頭髮頻繁的拉拔導致了牽引創傷性脫髮。
拔毛症則是對健康頭髮的故意拉拔，這情況通常具有由臨時性，或者是由精神或感情類問題引起的，常見於有拉自己頭髮、吮吸手指的習慣小孩子之中。
Hair loss is a very common problem that affects both men and women, from all parts of the world. Men are more prone to hair loss, and with the onset of hair loss, some people tend to lose some self confidence. However if and when the causes of hair loss are understood, it is possible to handle the problem much more efficiently.
The most common type of hair loss is androgenic alopecia which is a gradual thinning of hair, which culminates in hair loss. Its extreme form is alopecia universalis where there is total hair loss over the body. Although it is normal to lose hair in old age , some men experience hair loss during puberty.
It is generally thought that hair loss is an inheritance from the maternal side; however chances of such an inheritance are 50%. The actual causes of hair loss are varied and may range from anything like exposure to chemicals, poisons and some medical treatments like chemotherapy . Stress is also another reason for hair loss which may include emotional trauma and depression.
Even the growth of tumors and other types of outgrowths in the skin lead to hair loss. An unhealthy diet and lifestyle also tends to provoke hair loss. This means that a person following a sedentary lifestyle with a high fat diet with high calorie intake can lead to early hair loss.
Some diseases have hair loss as one of their symptoms. Such hair loss is usually vastly different from the normal hair loss that is associated with aging and is seldom the first and only symptom of these diseases. Some diseases associated with hair loss are hypothyroidism, iron deficiency, seborrheic dermatitis and secondary syphilis. Once these diseases are treated, hair grows back to its normal style.
There are also two other types of hair loss patterns; traction alopecia and trichotillomania. In traction alopecia, hair loss is due to excessive and chronic pulling of the hair which is more prevalent in people who braid or knot their hair. This is why Sikh men experience such hair loss - their beard hair is pulled straight and twisted and tightly knotted. It is this daily knotting that leads to traction alopecia.
In the case of trichotillomania, it is the intentional pulling of healthy hair. This is usually a temporary, psychiatric or emotional problem. It is most prevalent in children where the pulling of strands of hair is associated with thumb sucking and other habits.
人們一般認為脫髮是因為來自母方的遺傳，但這方面遺傳影響的概率大概只有50%。事實上，引起脫髮的因素很多，比如你暴露在了化學物質、有毒物質中或者接受瞭如化療之類的特殊治療等。壓力方面的問題，如情緒創傷、沮喪也是引起脫髮的原因之一。
頭皮上過多的油脂分泌物以及不健康的飲食習慣和生活方式也肯能會引起脫髮，如果一個人長期食用高脂類食物，從中攝取大量的卡路里也肯能導致早期頭髮。
脫髮也可能是某些疾病症狀之一。這種類型的脫髮與普通由年齡增長引起脫髮有很大不同，也很少會是這類疾病先發或者唯一的表現症狀。會引起脫髮症狀的疾病通常有：甲狀腺機能減退、缺鐵、脂諡性皮炎和二期梅毒疹，這種由疾病引起的脫髮也會在這些疾病被治癒後消失，到時你的頭髮就會回到正常的生長狀態。
還有兩種類型的脫髮：牽引創傷性脫髮和拔毛髮症。牽引創傷性脫髮一般歸咎於頭髮受到過度和慢性的拉拔，在喜歡給自己頭髮編辮子或打結的人群中較常見。這也是為什麼部分錫克人常常會經歷脫髮的原因，他們終生不剪頭髮，成年錫克男子一般都將頭髮用布層層圍起，繞成一個像“大磨盤”的頭包，這種對頭髮頻繁的拉拔導致了牽引創傷性脫髮。
拔毛症則是對健康頭髮的故意拉拔，這情況通常具有由臨時性，或者是由精神或感情類問題引起的，常見於有拉自己頭髮、吮吸手指的習慣小孩子之中。
Hair loss is a very common problem that affects both men and women, from all parts of the world. Men are more prone to hair loss, and with the onset of hair loss, some people tend to lose some self confidence. However if and when the causes of hair loss are understood, it is possible to handle the problem much more efficiently.
The most common type of hair loss is androgenic alopecia which is a gradual thinning of hair, which culminates in hair loss. Its extreme form is alopecia universalis where there is total hair loss over the body. Although it is normal to lose hair in old age , some men experience hair loss during puberty.
It is generally thought that hair loss is an inheritance from the maternal side; however chances of such an inheritance are 50%. The actual causes of hair loss are varied and may range from anything like exposure to chemicals, poisons and some medical treatments like chemotherapy . Stress is also another reason for hair loss which may include emotional trauma and depression.
Even the growth of tumors and other types of outgrowths in the skin lead to hair loss. An unhealthy diet and lifestyle also tends to provoke hair loss. This means that a person following a sedentary lifestyle with a high fat diet with high calorie intake can lead to early hair loss.
Some diseases have hair loss as one of their symptoms. Such hair loss is usually vastly different from the normal hair loss that is associated with aging and is seldom the first and only symptom of these diseases. Some diseases associated with hair loss are hypothyroidism, iron deficiency, seborrheic dermatitis and secondary syphilis. Once these diseases are treated, hair grows back to its normal style.
There are also two other types of hair loss patterns; traction alopecia and trichotillomania. In traction alopecia, hair loss is due to excessive and chronic pulling of the hair which is more prevalent in people who braid or knot their hair. This is why Sikh men experience such hair loss - their beard hair is pulled straight and twisted and tightly knotted. It is this daily knotting that leads to traction alopecia.
In the case of trichotillomania, it is the intentional pulling of healthy hair. This is usually a temporary, psychiatric or emotional problem. It is most prevalent in children where the pulling of strands of hair is associated with thumb sucking and other habits.
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