撰写Wen 审核 | 排版 Joan
Recently, #Sleeping with wet hair often causes cancer# rushed to the hot search, whether sleeping with wet hair has anything to do with cancer?—— In life, some people always have small pimples on their scalps, and they feel unbearable pain and itching. Most people think it's due to a shampoo quality problem.
In fact, a large part of the reason for these small bumps on the scalp is that everyone is Xi to take a bath and wash their hair before going to bed, and fall asleep under the condition of "not blowing dry hair or only blowing until it is semi-dry", resulting in a large number of microorganisms on the scalp, resulting in many small bumps, which may directly lead to a spike in the risk of cancer.
The latest findings in Nature confirm this claim. It can be seen that the Xi of sleeping with wet hair for a long time is not a trivial matter, it will harm people's health, and people with this Xi must pay attention to it and correct it in time.
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The dangers of sleeping with wet hair
1. Damage to the hair
Due to the friction between the hair strands and the pillow, it is easy to bend into various shapes, which is greatly exacerbated by sleeping with wet hair. In particular, after perming, dyeing and bleaching the hair is wet, it is more likely to curl and tangle, which may make the hair stretch beyond the original allowable elasticity range, and in this case, after the hair is curled and tangled, combing the hair is also more likely to cause hair breakage, damage the hair, and in severe cases, it will also lead to hair loss.
2. A large number of microorganisms multiply
The material of the pillow is generally more susceptible to moisture and mold, and the humid environment is more conducive to the growth of microorganisms, if the wet hair sleeps, the moisture on the hair penetrates into the pillow core, the pillow simply becomes a "microbial incubator", and the presence of a large number of microorganisms has a risk of cancer, which brings great harm to health!
3. Seborrheic dermatitis
Malassezia is a normal parasitic fungus that colonizes areas with abundant sebaceous glands, such as the head, face, chest, and back. Wet hair may allow Malassezia to multiply, stimulate the scalp to produce inflammatory reactions, resulting in erythema, papules, increased dandruff, scalp itching, etc., in severe cases, scratching, bloody scabs, and even oozing pus, odor, secondary bacterial infection, etc.
02
Excessive levels of Malassezia may cause cancer
1. Malassezia
Malassezia is a resident flora that is present on the surface of normal skin in humans. It is a lipophilic yeast that is mostly distributed in seborrhea areas, such as the head and face, trunk, and intertriginous areas.
At present, there are more than 10 species of Malassezia species, and the common ones on the surface of human skin are Malassezia furfur, Malassezia globulus, Malassezia sylvestris, Malassezia consoniensis, etc. When the skin barrier is damaged, the secretion of sebaceous glands is abnormal, the skin microbiota changes, the body's immune disorders, and long-term use of glucocorticoids or immunosuppressants, Malassezia may transform into pathogenic bacteria that invade the human skin and cause serious diseases.
Common Malassezia-related skin diseases include pityriasis versicolor, Malassezia folliculitis, and seborrheic dermatitis, and the Nature study mentions another harm of Malassezia - carcinogenicity.
2. Nature: Malassezia directly promotes the development of pancreatic cancer
Nature research found that the number of fungi in the pancreas of pancreatic cancer patients is 3,000 times that of the pancreas of normal people, and the most important fungus is Malassezia.
Studies suggest that Malassezia directly contributes to the development of pancreatic cancer, and that the original source of this fungus may have come from your scalp.
This study, conducted in mice and human patients with pancreatic cancer, provides strong evidence for the first time to find and reveal that Malassezia in the gut can be transferred to the pancreas through the duct and highly aggregated in pancreatic tissue, which in turn drives the complement cascade through the activation of mannose-binding lectin (MBL) to promote the development and progression of pancreatic cancer.
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These three signs have skyrocketed the risk of cancer
Since falling asleep with wet hair is so harmful, and Malassezia is so terrible, but the fungus can't be seen or touched, how can you know if the Malassezia in your body has multiplied in large numbers and increased the risk of cancer?
When Malassezia counts exceed the critical threshold, there are three major signs:
1. Small red bumps and pustules on the scalp, face, chest and back
If you have small hard pimples on your head, face, chest, and back, it is likely that Malassezia is starting to multiply.
Instead of a white tip like a pimple, this small pimple is a hard, red, swollen and uniformly sized pimple that often appears in patches and is accompanied by itching.
2. Peeling between the eyebrows and the wings of the nose
If you always have a reddish peeling between your eyebrows and the wings of your nose, then beware of seborrheic dermatitis. The pathogenesis of seborrheic dermatitis is not fully understood, but it is thought to be related to Malassezia and microbiota imbalance (e.g., Malassezia furfur, Propionibacterium), abnormal sebaceous gland secretion, host immune disorders, epidermal barrier disruption, neuroendocrine factors, and environmental factors.
Seborrheic dermatitis is accompanied by increased dandruff and vigorous sebum secretion, which further provides a good living environment for Malassezia.
3. Increased dandruff
Increased dandruff is one of the most common manifestations of Malassezia. The proliferation of Malassezia on the scalp causes excessive proliferation of the stratum corneum of the scalp, which causes the stratum corneum cells to shed off in large quantities in the form of scales, resulting in dandruff.
If you have the above 3 major manifestations and ignore them for a long time, maybe cancer will really find you......
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How can I avoid Malassezia?
1. Wash your hair frequently, bathe and change clothes frequently, prevent excessive sweating, dry bedding frequently, avoid rubbing oily skin care products, and do not wear tight clothing and non-breathable clothes, all of which can reduce the chance of Malassezia reproduction. At the same time, you should pay attention to your work and rest, stay up less late and exercise more (no need to exercise vigorously).
2. Diet:
Avoid spicy and stimulating foods: such as chili pepper, chili oil, curry, Sichuan pepper, mustard, wine, coffee, strong tea, green onions, ginger, garlic, etc.;
Eat less sweets: such as cakes and milk tea;
Avoid greasy and high-protein foods: such as fatty meat, fatty animal offal, egg yolks, fried foods, etc.
3. In addition to the need to contraindicate these foods, there are also these foods that are natural enemies of Malassezia – that is, foods that are high in zinc.
A 2023 study published in the European Journal of Pharmacology showed that the higher the zinc content in epidermal cells, the more difficult it is for Malassezia to survive.
Common foods rich in zinc are: oysters, beef, chicken thighs, old tofu, lean pork chops, pumpkin and pumpkin seeds, low-fat yogurt, wheat germ, shiitake mushrooms, etc. In your daily diet, you can consciously increase the intake of these foods to avoid the proximity of Malassezia.
Resources:
1. https://www.nature.com
2. https://www.myfooddata.com
3. https://www.sciencephoto.com
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