Do you blow dry your hair immediately after washing it?
Many people like to wash their hair and take a shower before going to bed, but sometimes they are too tired or troublesome, and their hair is not dry yet, so they can't wait to lie down.
Especially for people with long hair, blow dry thoroughly and start in 20 minutes.
So in order to save trouble, he often blew a few times perfunctorily.
But recently, some media outlets have deduced from an authoritative study published a few years ago that sleeping with wet hair can cause cancer.
But is that really the case?
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—The First—
Sleeping with wet hair causes cancer? too far-fetched!
The study was published in the journal Nature in 19, and the NYU School of Medicine research team found through DNA sequencing and mouse model testing that the number of fungi in the pancreas of pancreatic cancer patients is 3,000 times that of normal human pancreas.
Among them, the most common fungus is Malassezia, which promotes pancreatic cancer growth by activating MBL (mannose-binding lectin) to drive the complement cascade (necessary for tumor development).
The whole study did not mention "sleeping on wet hair", but some media added oil and vinegar, and directly concluded that "sleeping with wet hair can cause cancer" on the grounds that Malassezia likes moist and oily places (such as the scalp) to multiply, which is outrageous!
The Malassezia bacteria found in the study did not come from the scalp, but were fed to mice with markers and tested for fungal signals on the pancreas to infer that the fungi may have originated from gut microbes.
Moreover, Malassezia is a conditionally pathogenic bacteria.
What does that mean?
This means that everyone actually has Malassezia in their body, but it will coexist peacefully with the human body under normal circumstances and will not cause any health hazards!
Only under certain conditions, such as excessive sebum secretion and decreased resistance, can it easily explode and cause infections that lead to dandruff, itching, hair loss, folliculitis, seborrheic dermatitis and other problems, which have nothing to do with cancer.
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—The Second—
The hidden dangers of sleeping with wet hair are these 4
Sleeping with wet hair has nothing to do with cancer, but there are other hidden dangers.
1
Prone to facial paralysis
When the facial nerve is at its most relaxed and resistant, if it is stimulated by wet hair, it is easy to affect the facial nerve behind the ear, resulting in local spasm, thereby inducing facial paralysis.
In addition, some bad Xi habits when wet hair can also easily lead to noodles.
For example, blowing at the fan, opening the window of the car and blowing the door of the head, etc., it is also easy to be paralyzed.
Under the stimulation of wet hair + cold wind, the facial blood vessels constrict more violently, and once the local swelling of the facial nerve is overcompressed, facial paralysis occurs.
Similar news happens almost every year, so you must pay attention to it.
2
Prone to dizziness and headaches
Growing up, you must have heard the elders nag that "sleeping with wet hair will cause dizziness and headaches".
And this time, the elders' experience really didn't go wrong!
The reason why this happens is that water is trapped on the surface of the scalp for a long time, which makes the scalp temperature lower and affects the blood circulation in the brain, which can easily cause symptoms such as dizziness, headache, nausea, and vomiting.
Once in a while, these discomforts are also transient, and they can be taken slowly on the same day.
However, if you sleep with wet hair for a long time, you may suffer from symptoms of subscalp venous plexitis, often with local numbness of the scalp, or inexplicable headache or dizziness.
3
Prone to colds
Traditional Chinese medicine believes that the body's yang qi is weakest at night, and its ability to resist wind and cold is reduced.
In addition, after washing the hair, the water will remain on the surface of the scalp for a long time, and a large amount of water will evaporate, taking away the heat, which will make the scalp temperature too low.
In this case, pathogens will be more likely to invade through the respiratory tract, causing colds and colds.
4
Prone to hair loss
When the hair is wet, the cuticle is open and is very resistant to rubbing.
Hair is mainly composed of the epidermal layer, the cortical layer, and the medullary layer, while the epidermal layer is formed by the overlapping of many cuticles, which is also the umbrella of the hair.
When you sleep with wet hair, the friction between the pillow and your hair can easily make your hair tangled, bent, and messy.
Once you comb your hair, it's a massive hair loss tragedy.
makes the already small amount of hair even worse.
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—The Third—
How to dry hair quickly without hurting it?
Step 1
Absorbs excess water
Gently pat your hair dry with a soft towel to absorb excess moisture. Do not rub your hair with a towel to avoid damaging your hair.
Step 2
Apply essential oils to your hair
Before blowing your hair, apply some essential oil to the ends of your hair to help reduce damage to your hair from the heat of the hair dryer and protect your strands from the heat.
Step 3
Adjust the temperature and wind speed
Do not use too high a temperature, preferably around 57°C to avoid damaging the top layer of your hair.
Step 4
Keep your tuyere at a distance from your scalp
It is about 15-20cm away from the scalp, do not blow against the scalp, it is easy to hurt the hair and scalp due to high temperature.
It can also be used if the hair dryer is equipped with a condenser head, which concentrates the wind and accelerates the drying of hair. It can be used with a comb when blowing, making hair softer and more susceptible.
Step 5
Blow through your hair
Blow the roots and then the tips, moving back and forth to blow in the direction of the hair, which will close the cuticle and make the hair softer and shinier.
Falling asleep with wet hair is harmful, don't be lazy before going to bed!
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