Ultraviolet rays can cause hair loss! You must learn 2 tips to protect your hair from sunburn and prevent hair loss

On days when the sun is shining brightly, Gao Yumei will easily turn red when exposed to the sun, and it is especially easy to develop a lot of freckles near her cheekbones. Do you always put on a thick layer of sunscreen before going out? Woolen cloth? It provides heavy protection to the skin, but the hair and scalp are exposed to the sun without any protection. The strong ultraviolet rays will not only sunburn the hair, but may also cause baldness symptoms! What is the UV Index? It is common to see the ultraviolet index (UVI) in weather forecasts, but what do these numbers mean? The UV index forecast by the Meteorological Bureau refers to the maximum radiation intensity around noon. UVI 0~2, you can go out without sun protection measures. UVI 3~5, you need to wear sunglasses and a hat when going out. UVI 6~7, you will get sunburned within 30 minutes of exposure. In addition to sunglasses and hats, you also need to apply sunscreen. Breast milk, or wear long-sleeved clothes, hold a parasol, and try to stay in the shade. If the UVI is 8 to 10, you will get sunburned within 20 minutes of exposure. If the UVI is above 10, you will get sunburned as long as you are exposed to the sun for 10 minutes. As long as the UVI exceeds 8, you will get sunburned. Avoid going out between 10 a.m. and 2 p.m. and stay indoors as much as possible. What damage will ultraviolet rays do to your hair? The intensity of ultraviolet rays will change with the sunshine time, distance from the earth and solar altitude angle. The amount of radiation reaching the ground will also be attenuated due to the absorption, scattering and reflection of the earth's atmosphere. The Central Weather Bureau mentioned that the strongest ultraviolet intensity in the Northern Hemisphere is usually between June and August, and the weakest period is between December and February. According to the geographical location, the closer to the equator, the higher the ultraviolet intensity. , In addition, factors such as ozone layer thickness, cloud cover and air pollution will also affect radiation intensity. According to the wavelength of ultraviolet rays, it can be mainly divided into UVA and UVB. Japanese beauty consultant Yu Qing Naomi mentioned that UVA accounts for 95% of ultraviolet rays, which not only affects the surface layer of skin, but also penetrates deep into the skin, damaging collagen and elastin, reducing skin elasticity, and easily forming wrinkles and sagging. UVB will be absorbed by the ozone layer and clouds, so that the UVB that reaches the ground only accounts for 5% of the ultraviolet rays. It will cause red inflammation of the epidermis or cause pigmentation, liver spots or freckles, and can also cause sunburn on the hair. It becomes rough, hard, dry, and prone to bifurcation and breakage. Yu Qingshangmei also mentioned that UVA will reach the dermis layer of the scalp and cause damage to the scalp as a whole. In addition to destroying scalp cells, it will also cause the blood and lymph circulation to deteriorate, unable to deliver nutrients to the roots of the hair, and it will also accumulate old age. Waste and inflammatory substances make it difficult to generate new hair, leading to symptoms of excessive hair loss or baldness. How to prevent hair loss caused by ultraviolet rays? Use hair sunscreen spray or wear a hat to block ultraviolet rays. Commercially available sunscreens are divided into SPF and PA. What is the difference? Yu Qingshangmei mentioned that SPF can protect against UVB, while PA can protect against UVA. The larger the value, the more effective it is in sun protection. Basically, a sunscreen spray with a high value only needs to be used once a day to achieve the desired effect. The effect of chemical sun protection needs to be adjusted randomly based on the time spent in the sun and the amount of sweat. Wearing a hat can achieve the effect of physical sun protection. If the hair root cannot absorb complete nutrients, it will be shaky and less able to generate new hair. Therefore, it is important to improve the blood and lymph circulation of the head. Yu Qing Shangmei mentioned that the head is covered by a lot of fascia, so overall massage of the head can relieve fascial adhesion, and the method of pulling the ears outward, or letting the shoulders rise upwards , and downward relaxation movements will help promote blood and lymph circulation in the head.