Scalp and face skin is relatively the same, will constantly occur shedding and regeneration, if there is no shedding of clumps large enough to be visible to the naked eye observation, this is the treatment of dandruff, referred to as dandruff.

Snowflake dandruff not only affects the image, but also causes scalp itching,消委會推介洗頭水
inflammation, affecting people's physical and mental health. What causes it?

Causes of dandruff

①Malassezia proliferation

The essence of dandruff is the premature shedding of skin surface cells. The normal metabolic cycle of the epidermis is about 28 days.

If Malassezia (a fungus) proliferates on the scalp, it not only converts the triglycerides in sebum into unsaturated fats, but also penetrates the stratum corneum and causes inflammatory reactions such as itching, it also causes an increase in the metabolic rate of the cells of the scalp,平安鐘電話 shortening the metabolic cycle to 7-21 days. As a result, the surface layer of cells is not fully metabolized, and the bottom layer of cells swarms in, ultimately leading to a large scaly shedding of the surface layer and dandruff visible to the naked eye.

②Increased sebum secretion

Sebum will form a sebaceous film on the scalp, play a protective role, but too much sebum will provide nutrients for the Malassezia bacteria, so a few days do not wash your hair, the scalp will be itchy, dandruff will increase.

③ Damaged scalp barrier

When the scalp barrier function is damaged, Malassezia and its related metabolites can easily carry out penetration development into the stratum corneum, further research triggers dandruff and itching. So people with dandruff should avoid bad behavioral habits such as students scratching their scalp hard and sharing combs with others.

Because the important cause of dandruff is Malassezia and sebum, so in the choice of dandruff shampoo,鑊鏟 it is important to look at the bacteriostatic active ingredients, followed by surfactant ingredients.

Bacteriostatic anti-dandruff ingredients should be carefully selected

Zinc pyrithione

Zinc pyrithione (ZPT) is the most common antimicrobial anti-dandruff ingredient, which can inhibit the growth of fungi and is not easily absorbed by the skin, so it is inexpensive. However, ZPT is toxic to a wide range of organisms in water.2021 In October 2021, the European Commission issued a regulation listing ZPT as a banned ingredient in cosmetics.

②Pyrrolidone ethanolamine salt

Pyrrolidone ethanolamine salts are more environmentally friendly and relatively expensive than zinc pyrithione, and are currently only used in high-end and leave-on products, with some acne products using this ingredient as a biocide. Ingredients such as chlorimidazole, salicylic acid, sulfur, coal tar, and selenium disulfide are also common, but also problematic in one way or another.

③ Ketoconazole

Ketoconazole is a common anti-dandruff lotion found in drugstores that is effective in preventing seborrheic dermatitis and dandruff flare-ups, but it can cause mild itching, irritation, and dryness of the skin. It is a banned ingredient in cosmetics and needs to be used under medical supervision. It is recommended to use it no more than twice a week.

To remove dandruff do this

Control the water temperature and some time. The temperature of the water and the human body to carry out the body temperature is about the same, can not require too high, otherwise students are prone to appear to lead to excessive sebum removal from the scalp, but instead can produce impact more dandruff. Appropriate by extending the shampoo in the scalp to stay for a period of time, so that the efficacy of anti-dandruff agent role can realize the full development of play. After washing try not to let the conditioner touch the scalp (unless it is anti-dandruff conditioner), the reason analysis is the same is to extend the anti-dandruff agent in the scalp to stay for a certain period of time, to avoid anti-dandruff efficacy of the ingredients by the conditioner washed out.

Slight to severe discrimination. For mild dandruff, choosing the right shampoo based on the above criteria, along with proper application, will in most cases keep the amount of dandruff at the desired level. If the dandruff is very severe and does not show any signs of relief, you should at this time go to a dermatologist in a hospital and consult your doctor about eczema, seborrheic dermatitis, neurodermatitis, bacterial infections etc.

Be careful with coloring products. If the problem of dandruff suddenly appears after changing shampoos or perming and coloring your hair, the reason may be that a certain ingredient in the shampoo or perming product irritates the scalp and produces dandruff. At this time, it is necessary to correct the triggering factors in a timely manner, to reduce the stimulation of the scalp, or choose other shampoos.

In addition to dandruff but also oil control

If dandruff is accompanied by hair obvious oil phenomenon, indicating that too much sebum, this time should be appropriate to remove fat. However, too little sebum will lead to a reduction in scalp moisture. Therefore, in the use of shampoo products can not blindly pursue "fresh oil control", sebum can not be too much, not too little.

Sulfates are commonly used as degreasing surfactants in shampoos, especially sodium dodecyl sulfate and sodium dodecyl polyether sulfate. The former is highly irritating and prone to skin inflammation, making it unsuitable for consumers suffering from dandruff to be exposed to this ingredient. The latter has similar cleansing and foaming power to sodium lauryl sulfate, but is much less irritating.

Online anti-dandruff remedies are not to be trusted

Online there are a lot of Chinese claim that they can go to dandruff recipe, for example, with the beer business or white vinegar hair wash, combined with our above analysis method can be through to know, these recipes can neither inhibit bacteria, nor can achieve oil control, so did not count on them to go to dandruff is simply is not feasible; on the contrary, its contains alcohol, acetic acid and other ingredients may also produce stimulation of the scalp, dandruff is harmful to the health and not beneficial.

Finally, do not use anti-dandruff shampoo for a long time. Because normal bacteria form a micro-ecological environment on the surface of the skin, long-term use of antiseptic anti-dandruff shampoos can disrupt the balance of bacteria and lead to scalp problems.

In addition to external care products, internal adjustment is also very important. To eat a balanced diet, regular work and rest, maintain a good state of mind, strengthen the resistance to flora, from the source to control dandruff.

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