▶ Previous Artlcle : #3-4. What Are the Causes of Hair Loss?

 

 

Stress

 

Although it is true that stress affects hair, it is difficult to say that baldness occurs simply because of stress itself.

 

Chronic stress causes vasoconstriction by the hormones of the sympathetic nervous system and reduces the amount of nutrients and oxygen supplied to keratinocyte cells, causing hairs to become thinner and gradually detached from the entire scalp.

 

It is also known that stress becomes the cause of ataxia, which stunts the growth of hair and activates 5-alpha reductase.

 

If stress is coupled with other factors that affect hair loss, such as testosterone, genetic factors, and aging, it speeds up the process of hair loss.

 

Stress is also known to cause alopecia areata in children, women and adolescents.

 

Sleep deprivation is another cause for hair loss resulting from vasoconstriction. Emotional anxiety, nervousness and severe stress can also trigger hair loss.

 

 

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Abnormalities of Sebum Secretion

 

Sebaceous glands, which are closely related to testosterone, play an essential role in the human body, protecting the scalp and hair.

 

Excessive or insufficient sebum secretion adversely affects the scalp.

 

For the sebum alone, alopecia seborrhecia may be a direct cause of abnormalities of sebum secretion, but in most cases, sebum becomes an auxiliary factor that exacerbates hair loss and scalp problems.

 

Excessive sebum secretion driven by an increase in testosterone due to seborrheic dermatitis, male-pattern baldness, postpartum hair loss, and menopausal hair loss can cause seborrheic hair loss.

 

 

Figure 1. Types of seborrhea.

 

 

 

-To be continued