The main difference is that these layers — especially the stratum corneum, which forms a protective barrier over the others — is much thinner in the lips and, therefore, more vulnerable to damage. Additionally, lips don't have any hair follicles or oil glands of their own. Instead, the oil from glands around our lips provides moisture.
主要区别在于唇部皮肤的这三层细胞(特别是具有保护其它两层细胞作用的角质层)比其它部位皮肤更薄,故而也更容易受伤。此外,唇部皮肤没有任何毛囊或油脂腺体。唇部保湿需要依靠周围腺体产生的油脂。
Licking your lips or applying a thin gloss, balm or anything out of a tube to supplement that moisture may sound like a good idea, but it can be the worst thing you do for them because it can lead to further dehydration, Jacob said.
Jacob说,舔一舔嘴唇或薄涂一层闪光的唇膏(或其它产品)保湿听起来是一个不错的主意,但实际上这可能是你做的最糟糕的事,因为它会引起进一步脱水。
Some lip balms contain ingredients that can be irritating or drying. Menthol, salicylic acid, cinnamic aldehyde and peppermint flavors are all culprits, Jacob said. "A lot of people don't have any problems with these ingredients, but people with sensitive skin or allergies may be more sensitive to these on their lips, as well," she said.
一些润唇膏含有刺激或干燥成分。薄荷醇、水杨酸、肉桂醛和胡椒薄荷香料都是祸因。“很多人都能接受这些成分,不会有任何问题。但敏感肌或者过敏体质者的唇部皮肤可能对这些成分要敏感很多。”
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