Bacteria thrive in a warm, damp environment, much like your pillow and scalp when you go to sleep with wet hair. This provides the ideal environment for bacterial growth which can in turn lead to build-up, inflammation, and redness.
When your hair is wet, it's more fragile and prone to breakage, says Jasmine Burnside, a hairstylist in New York City. "Going to bed with wet or damp hair will most likely lead to more friction on the strands, ultimately leading to potential damage." That's why she says it's something that she advises against.
If you don't want to use heat, at least let your strands air-dry before going to bed. Sleeping on damp hair is better than sleeping on wet hair.
Make sure hair is damp—not soaking wet—before going to bed.
If you can spare a few moments before bed, Shaw says it's a good idea to towel dry—though not for the reason you may think. "Damp hair is definitely better. Wet hair can make your pillow wet and breed mold under the pillowcase," she says.
Hair is vulnerable when wet and leaving it that way before bed means it'll be rubbing all over your bedding while you sleep, which can lead to breakage. (Plus, air-drying hair overnight can also lead to dandruff because wet hair and a wet scalp can cause yeast to build up on your scalp.)
One of the most common myths surrounding hair is that sleeping immediately after showering will make you go blind or insane. What happens when you sleep with wet hair? While there are disadvantages to sleeping with wet hair, there's no correlation between wet hair, eyesight, and insanity.
By not drying hair at all after a shower, the water droplets stay in your hair, which makes your hair swell up. This swelling causes damage to the proteins that make up the structure of your hair. When these proteins are impacted, your hair looks and feels rough (cue frizz).
Sleeping on the same side for a long time can put extra pressure on the shoulder you sleep on, as well as your hips and lower back. This can cause or worsen shoulder, hip, or lower back pain. Sleeping on your side can also potentially cause lower back pain if your spine isn't properly aligned.
Specifically, sleeping on the side or back is considered more beneficial than sleeping on the stomach. In either of these sleep positions, it's easier to keep your spine supported and balanced, which relieves pressure on the spinal tissues and enables your muscles to relax and recover.
Research reveals more women prefer to sleep on the left side of the bed than the right - and the reason why is super cute.
As for how humans slept without soft pillows, they likely slept in a more upright or reclined position rather than lying flat on their backs, as is common today. They may have also used blankets or other soft materials to cushion their heads and support their necks while they slept.
The best way to dry your hair is to let it air dry under the fan as much as possible. However, some experts believe combining air and blow-drying is healthier than just air drying. It is good to let your hair air-dry seventy percent of the way and then blow-dry till they become dry ultimately.
How Much Should You Wash? For the average person, every other day, or every 2 to 3 days, without washing is generally fine. “There is no blanket recommendation. If hair is visibly oily, scalp is itching, or there's flaking due to dirt,” those are signs it's time to shampoo, Goh says.
“Whatever you do, do not brush your hair when it's wet because that's when it's at its weakest and becomes vulnerable to breakage (leading to flyaways), split ends and damage,” advises Rob. “Even worse you can actually pull hair from the roots that way.
If you go to bed with wet hair, you're more likely to wake up with a headache. That's because to avoid sleeping on something that feels wet, your head bends in awkward positions that can strain your neck and head muscles. This strain can lead to tension headaches or migraines.
Even the best sleepers move around at night, which puts tension on your strands. Another concern with wet hair is that it can actually create a dandruff problem. Wet hair and a wet scalp can create yeast on your scalp. That yeast buildup can become dandruff, which would not only be flaky, but itchy as well.
Wearing them while asleep puts them at great risk for serious damage. You could roll over on them or tear them up in your sleep. When you go to bed, your glasses are better off in their case.
Is Oily Hair Healthy? Oily hair isn't healthy or unhealthy by default. People with an oily scalp can have healthy hair or dry, brittle hair. Your hair needs oil to be healthy, but too much oil can lead to buildup on the hair and scalp.
According to stylist Rosi Fernandez, director of Ananda Ferdi it is not advisable to go for more than a week without washing hair, as follicles become clogged and do not get oxygenated," she explains.
Dandruff
Going a long time without washing your hair can cause a buildup of a yeast-like fungus called Malassezia on your scalp. Over time, this leads to a layer of dead skin cells that shed from your head in the form of oily, yellow-ish dandruff flakes. Dandruff can also make your scalp red, scaly, and itchy.
Hair is most vulnerable to damage when it is wet.
The results documented in the published paper referenced above show that letting hair dry naturally causes the cortex (the thickest layer of hair) to swell and become weaker, as the swelling puts pressure on the delicate proteins that hold hair together.
For example, cold and dry air can actually cause the cuticle of the hair strand to lift ever so slightly. As a result, moisture doesn't stand a chance of staying locked into the hair shaft. This explains why many women find themselves battling breakage and frustrating frizz during this frigid time of year.
As a general rule, when you sleep with your arm under your pillow, it helps keep your spine in a neutral position and reduces aches and pains in your muscles and joints. This is because it helps to hold your arm in place and take some of the weight off of it which can reduce discomfort.
First, if you're on your back, having your knees raised or elevated is a more comfortable way to sleep. It takes pressure off of the lower spine by counter rotating the pelvis. So, if your legs are straight, the pelvis then rotates in this vicinity, or this direction, and it creates more pressure on the lower back.