After washing your hair, are you used to blow dry it right away, or do you air dry it naturally?
Some people think that if you don't blow after washing, it's easy to get cold and have a headache; Some people feel that hair dryers hurt their hair, and frequent use of hair will become more and more frizzy. Is that really the case?
Life Times synthesizes expert views and takes you to unlock scientific hair drying methods.
Experts interviewed
Yang Xichuan, chief physician of the Department of Dermatology, Southwest Hospital, Army Medical University
Wang Jingqing, chief physician of the Department of Encephalopathy, Nanjing Hospital of Traditional Chinese Medicine
Blow dry or air dry immediately after washing your hair?
Both of these dry hair methods have their own advantages and disadvantages.
Blow drying: Dries quickly but damages hair
The hair is covered with hair scales, like the armor of the hair, so that moisturizing ingredients, proteins, etc. are not stimulated by the outside world.
After washing the hair, the hair scales are open and more fragile. At this time, the use of a hair dryer to blow, not only the wind force will aggravate the friction between the hairs, damage the hair scales; High temperatures can also evaporate moisture from the hair shaft and damage hair.
In the thermal imaging equipment recording, the maximum temperature of the hair dryer can exceed 150°C; The scalp temperature is as high as 61°C when blowing hair, and the more you blow, the more frizzy and easy to break, resulting in hair loss.
Air drying: preserves hair but may promote dermatitis
Malassezia is a common normal parasitic fungus that colonizes areas rich in sebaceous glands.
Wet hair can easily allow it to multiply in the hair follicles, stimulate the skin to produce an inflammatory response, resulting in itchy scalp, dandruff, erythema and papules, and even scabs, with greasy white or yellowish scales falling off.
Sleep before the hair is completely dry, the nerves behind the ears are stimulated by wet and cold, and even local spasms may occur, inducing facial paralysis.
Dry hair by dermatologists
Both blow-drying and drying have disadvantages, which one should I choose? In fact, mastering the correct use of hair dryer can minimize thermal damage to hair.
No.1
There are two "standard movements" after washing your hair
Blot with a towel
Wrap your hair in a thick towel after washing your hair, and it will work better with a dry hair cap. Press from top to bottom to let the towel suck moisture out of your hair.
Do not rub your hair vigorously, so as not to increase the mechanical damage to the fibers and destroy the hair.
Partition before blowing
Divide the hair into three areas, right, left and back, so that each area can be blown in a short time, which is greatly improved.
No.2 This blow protects the hair
+ Temperature: about 57°C is preferred
This allows the hair to dry quickly in a short time while preserving the hair's natural moisture.
If the hair dryer is equipped with a collector, it can also be used, which concentrates the wind power and accelerates the drying of hair. Combining a comb with the air blows to make hair softer and more supple.
+ Distance: Keep 10~15 cm from the hair root
The air outlet is facing down, you can blow the scalp first, and then the hair strands. When blowing, shake the hair dryer from time to time to avoid direct blowing that causes a burning sensation on the scalp.
+Duration: Judging by the feeling of moisture
Since the hairstyle, hair volume, and hair length are different, the specific length is suitable for touching the hair after blowing and feeling moist.
When the hair is seven or eight minutes dry, slowly blow the hair with cold air to close the hair scales opened by the heat and improve the shine of the hair. You can also use hair oil or leave-in conditioner products as your hair dries to keep your hair supple.
The whole scientific process from wet hair to rinsing
A popular science program on Japan's TBS TV found that if the shower is aimed at the hair and wet directly, it is easy to ignore the scalp, allowing dirt to remain on it, affecting subsequent cleaning; And rubbing the hair to make the shampoo blister is a crit on the hair scales.
Comb before washing your hair
Start by combing your hair with a comb with a wide tooth gap and a round head to reduce the problem of dust adhering to the hair and hair knots.
Rinse scalp for 90 seconds
Japanese dermatologist Satoko Hamanaka believes that the first step in washing hair is to rinse the scalp, not the hair, and the time should be more than 90 seconds, which can wash off 80% of the dirt.
Lather shampoo before topping
Pour shampoo into the palm of your hand, add water to lather and apply it to your hair, not only will the foam be rich, but your hair will also wash cleaner. It is difficult to create foam by hand, so you can use tools such as foaming nets.
The conditioner is 1~2 cm from the scalp
The conditioner is applied directly to the scalp, which tends to clog the hair follicles. It is recommended to apply to the tips near the ears.
The conditioner should not stay for too long, and long-term application will not improve the absorption effect of the conditioner, but will make the conditioner adhere to the hair, which is easy to damage the stratum corneum of the hair during washing, and even cause hair loss.
The rinsing water temperature should be 40°C
If the water temperature is too high, it is easy to take away too much oil from the scalp, aggravate the oily scalp and produce dandruff.
When rinsing, the water flow is gentle, and the hair spinning and thinning position should not rinse for too long. ▲
Editor of this issue: Zhao Ziying
Copyright statement: This article is the original of "Life Times", unauthorized reproduction is refused.