The causes of thinning hair on the top of the head are mainly male pattern baldness (AGA) caused by male hormones and poor blood circulation in the scalp. In this article, we will explain the mechanism of thinning hair on the top of the head and countermeasures.
Thinning hair on the top of the head is mainly caused by male hormones
Thinning hair on the crown of the head can be caused by a variety of factors, but the majority is caused by male pattern baldness (AGA), which is caused by the male hormone DHT (dihydrotestosterone). In male pattern baldness, unlike other forms of alopecia, thinning hair characteristically occurs only on the top of the head and at the hairline.
There are signs of gradual thinning and weakening of the hair, accompanied by progression. Alopecia is most common in men, but it can also occur in women when there is a hormonal imbalance and male hormones are predominant.
Mechanism of male pattern baldness (AGA)
Male pattern baldness is caused when DHT (dihydrotestosterone), which is produced by the enzyme 5-alpha-reductase reacting with testosterone, enters the hair matrix cells.
The hair falls out before it has fully grown. DHT receptors are necessary for DHT to enter the hair matrix cells, and since there is a genetic component to the number of DHT receptors, people with family history of thinning hair are at higher risk of thinning hair.
Thinning hair due to male pattern baldness (AGA) can be improved
Thinning hair caused by male pattern baldness (AGA) can be improved by inhibiting the action of 5-alpha-reductase, an enzyme that converts testosterone to dihydrotestosterone.
Treatment of male pattern baldness is actively conducted at medical institutions, where oral and topical medications can show significant improvement within two to several months after the start of treatment. In the case of male pattern baldness, the hair matrix cells themselves maintain their normal function, so healthy hair can be regained once again.
Another cause of poor blood circulation in the scalp
A cause of thinning hair on the top of the head other than male pattern baldness (AGA) is poor blood circulation in the scalp. When the scalp becomes hard, the weight of the scalp itself causes the scalp to sink, a condition called scalp subsidence, which puts pressure on the capillaries in the scalp. As a result, the hair follicles do not receive sufficient nutrients, which weakens the follicles and causes hair loss.
In this case, massage is effective to soften the scalp. Stress and stiff neck/shoulders can also cause poor circulation in the scalp, so take a look at your overall body condition.
Thinning hair on the top of the head is something that can likely be improved. If you are concerned about thinning hair, take action as soon as possible.