This daily habit can cause hair loss while you sleep.

Some people find it too much trouble to dry their hair after a shower. It's not uncommon to find people sleeping with wet hair on their pillows. However, sleeping with wet hair can have negative effects on the scalp and promote hair loss.

 

◇Seborrheic dermatitis can cause hair loss do

 

Wet hair is a breeding ground for bacteria. Sleeping on a pillow while wet can prevent the area from drying properly, leaving it damp and clammy. This environment facilitates the growth of dandruff bacteria. A damp scalp can easily attract impurities like dust. The scalp also produces more sebum, and dandruff bacteria thrive in these areas, proliferating rapidly. These bacteria can clog pores and oxidize the skin, leading to seborrheic dermatitis (SED). If your hair quickly becomes greasy despite daily washing, or if you have a lot of dandruff and feel itchy, you should consider SED. Severe SED can lead to hair loss, as hair growth is hindered, leading to thinning and even loss during growth.

Sleeping with wet hair can also cause hair damage. Hair is composed of an inner cortex and an outer cuticle. When water touches hair, the tough outer layer of the cuticle becomes wet first, and then the water is absorbed into the inner cortex. When hair is completely wet, it swells and becomes more susceptible to damage from external stimuli. Wet hair is more prone to splitting and breaking than dry hair. Hair can absorb up to 30% of its weight in water, but the longer it stays wet, the more water it absorbs, making it more prone to splitting and damage.

 

◇Recommended to dry completely with cold air

 

  After washing your hair, gently blot it with a towel to remove any excess moisture. Then, use a hair dryer to thoroughly dry the scalp and roots. It's better to use cool air rather than hot air. Hot air stimulates sweat and oil production in the hair roots. If using hot air, hold the dryer about 20-30cm away from your head. Another option is to first dry stubborn areas like behind the ears and the back of the head with hot air, then use cool air for the rest of the hair.

 

 

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On hot days, I turn on the fan next to me and dry it with cool air.

Winter is the biggest problem

I'm drying it with a lukewarm wind

 

They say that drying the hair roots is the best.

They say that just drying your hair doesn't help at all.