Will sunburn on the scalp cause hair loss? Why does sun exposure cause hair loss?

In the hot summer, sometimes people will inevitably be exposed to the sun, causing sunburn. So, will sunburn on the scalp cause hair loss?

Will sunburn on the scalp cause hair loss?

Severe sunburn of the scalp may cause hair loss. Long-term exposure to ultraviolet rays can damage the hair follicles on the scalp and cause increased hair loss. Therefore, whether you are a man or a woman, it is very necessary to protect your head from the sun. If boys find it inconvenient to hold an umbrella when going out, they can wear a sun hat when going out, or use hair sunscreen spray to prevent sunburn.

Why does sun exposure cause hair loss?

If sun protection is not done properly, the speed of skin aging will be accelerated. The scalp is the second thinnest skin on the human body. It ages 6 times faster than the face and 12 times faster than the body skin. The scalp secretes 2 times more oil than the facial skin. Unlike the 28-day metabolic cycle of general skin cells, the metabolic cycle of scalp cells is only 14-21 days. The aging of the scalp will not only accelerate the sagging of the facial skin, but more importantly, if the scalp is sunburned, the good days of the hair will be numbered.

Hair is made up of keratinocytes, most of which are keratin. Keratin is made up of a rather long amino acid chain, which contains about 20 kinds of amino acids, and most of them are cysteine. When exposed to sunlight, cystine in the hair can absorb ultraviolet rays and thus protect the scalp.

However, after exposure to sunlight, cystine absorbs a large amount of ultraviolet rays, which will cause its own disulfide bonds to break and decompose. The keratin in the hair will denature and break, and the hair will lose its original moisture and nutrition. The strong ultraviolet rays in the summer will reduce the hair's resistance to physical damage, hinder the chain bonding of proteins in the hair, break them, and cause the hair scales to curl up and peel off, making the hair brittle and easy to break. At the same time, ultraviolet rays will cause the loss of moisture in the scalp, reduce the water control ability, and cause the hair to become dry and frizzy. Moreover, it is hot in summer and it is easy to sweat, and a lot of sweat tends to accumulate at the roots of the hair. If it is not cleaned thoroughly, a lot of dirt and bacteria will accumulate in the hair follicle area of ​​the scalp over a long period of time, causing an itchy scalp.

Therefore, whether you are a man or a woman, it is very necessary to protect your head from the sun. If boys find it inconvenient to hold an umbrella when going out, they can wear a sun hat when going out, or use hair sunscreen spray to prevent sunburn. In addition, the process of self-repair for sunburned hair is very difficult. It must receive sufficient nutrition from the outside and be properly repaired in order to reduce the damage to the hair.

What to do when your hair is sunburned

If your hair has been sunburned, try to trim the damaged hair. If your hair is severely sunburned, you should cut it off completely and then take good care of it.