Why You Shouldn’t Sleep with Wet Hair: The Experts’ Answer

Sometimes, after an evening shower, you really want to go to bed and fall asleep with wet hair, because you simply don’t have the energy to dry it after a busy day. Sleeping with wet hair can lead to very sad consequences – from various diseases of the scalp to hair loss.

The growth of bacteria

When you sleep with wet hair, especially if it is thick and long, the heat from your head and water create moisture. And this is an ideal environment for the emergence of various microorganisms that begin to rapidly multiply bacteria and fungi – on the pillow, hair, and scalp.

Fungal infections

Sleeping with wet hair can increase the risk of fungal infections of the scalp. One such fungus that can grow in this humid environment is Malassezia. This fungus causes a large amount of dandruff or dermatitis.

Hair loss

Wet hair is more fragile and brittle, so it is more prone to split ends. Tossing wet hair when you turn in your sleep can cause friction. This will make your hair even more susceptible to breakage.

So try to make sure to blow dry your hair before going to bed or dry it naturally. Choose towels that absorb water quickly, and change your pillowcases to silk ones to reduce friction.

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Written by Emma Miller

I am a registered dietitian nutritionist and own a private nutrition practice, where I provide one-on-one nutritional counseling to patients. I specialize in chronic disease prevention/ management, vegan/ vegetarian nutrition, pre-natal/ postpartum nutrition, wellness coaching, medical nutrition therapy, and weight management.

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