2024-04-12 08:32:40
Foreign medical research results show that the scalp and hair are in the healthiest condition if you wash your hair 5 to 6 times a week. However, if you only wash your hair once a week or even do not wash it at all, the hair follicles are prone to accumulation of dirt, leading to itching, inflammation and other scalp problems. question. (Schematic diagram/extracted from TPG Dazhi Image)
Many people think that washing their hair is a troublesome thing and they can go without washing it for as long as they can. But how many days is the right time to wash their hair? A foreign medical study shows that the scalp and hair are in the healthiest condition if you wash your hair 5 to 6 times a week. However, if you only wash your hair once a week or not at all, the hair follicles will easily accumulate dirt, leading to itching and inflammation. Wait for scalp problems.
Huang Xuan, a thoracic and critical care specialist, posted on Facebook that he is often asked by patients “How many days does it take to wash your hair before it is clean?” In fact, the medical journal “Skin Appendage Disorders” has published a study as early as 2021, confirming that washing is necessary. Hair frequency is closely related to scalp health.
Huang Xuan pointed out that the results of this study found that subjects who washed their hair 5 to 6 times a week had better hair quality and no redness or damage to the scalp; subjects who washed their hair 0 to 1 time a week had better hair quality. For those who wash their hair too few times, a large amount of dirt can easily accumulate on the scalp, which may cause scalp problems such as itching and clogged hair follicles, and even induce seborrheic dermatitis. Those who wash their hair more than 7 times a week are “over-washing”. The scalp is prone to excessive dryness or irritation, causing skin problems such as redness and inflammation.
In this regard, Huang Xuan cited researchers who pointed out that scalp types can be divided into 5 major categories. It is recommended that different scalp types should choose different care products. Category 1, “normal scalp”, this type of scalp has a good balance of oil and moisture. , not too dry or greasy, the hair looks healthy, shiny, and easy to take care of. For this kind of scalp, general hair care products can achieve good results; Type 2, “dry scalp”, dry scalp A dry scalp may feel tight, itchy, and even experience dandruff because the scalp lacks enough oil to stay moisturized. For dry scalp, it is key to choose hair care products that are nourishing and moisturizing to avoid using products that are too harsh. shampoo.
Category 3, “Oily Scalp”. People with oily scalp have strong oil secretion, and their hair easily becomes greasy and may be accompanied by dandruff. This type of scalp requires the use of oil-control formula shampoo, and may require more shampoo than other types. Scalp wash hair more frequently; Type 4, “combination scalp”, a combination scalp may be oily in some areas (such as the forehead and crown), while other areas (such as the sides and back of the scalp) may be dry For this type of scalp, you may need to choose different care products according to different parts; Category 5, “Sensitive scalp”, sensitive scalp is easily irritated and may cause erythema and itching due to certain ingredients or environmental factors. Or tingling sensation, for this type of scalp, it is very important to choose hair care products that are fragrance-free and mildly formulated.
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