【健康醫療網／記者曾正豪報導】炎炎夏日是紫外線高峰期，對此，食藥署特別邀請臺北醫學大學附設醫院皮膚科李宗儒醫師分享，唇部皮膚的含水量與屏障功能較低，若沒有做好防曬措施，不僅水分易流失，還可能導致乾裂、黯沈與老化，甚至有皮膚病變及癌化的可能。
[Report by Health Medical Network/Reporter Zeng Zhenghao] The hot summer is the peak of ultraviolet rays. In this regard, the Food and Drug Administration specially invited Dr. Li Zongru from the Department of Dermatology at the Taipei Medical University Hospital to share that the lip skin has low moisture content and barrier function. If not, Taking good sun protection measures will not only cause moisture loss, but also cause chapped, dull and aging, and even skin lesions and cancer.
唇部防曬 首要目的預防皮膚癌
李宗儒醫師表示，唇部防曬，除了預防曬黑、曬傷與老化，最主要的目的就是預防皮膚癌。尤其下嘴唇面積較大也較突出，容易長期曝露於紫外線的傷害，如未做防曬，會提高日光性唇炎（癌前病變）的機率，並增加皮膚罹癌的風險。
當唇部有不易癒合的傷口，反覆破皮及脫屑等症狀出現時，應提高警覺，並儘速至皮膚科進一步檢查，確認有無罹患皮膚癌（尤其是鱗狀細胞癌）的可能。
Lip sunscreen is the primary purpose of preventing skin cancer Dr. Li Zongru stated that sunscreen on lips, in addition to preventing suntan, sunburn and aging, the main purpose is to prevent skin cancer. In particular, the lower lip area is larger and more prominent, which is prone to long-term exposure to ultraviolet rays. If sunscreen is not used, it will increase the chance of solar cheilitis (precancerous lesions) and increase the risk of skin cancer. When there are non-healing wounds on the lips, repeated peeling and scaling and other symptoms, you should be alert and go to the dermatologist for further examination as soon as possible to confirm whether there is a possibility of skin cancer (especially squamous cell carcinoma).
防曬效果 塗抹頻率與塗抹量是關鍵
食藥署指出，防曬產品經常以SPF及PA來標示產品的防曬效果，這是為了防止來自紫外線中的短波UVB和長波UVA所設計。SPF是針對UVB的防曬指標，SPF15表示能延長15倍皮膚曬傷、曬紅的時間；SPF50則是延長50倍。PA是阻隔UVA的防護指標，代表能延緩皮膚曬黑的能力，其數值以「+」表示，最高可至4個+號，也是延後曬黑的倍數概念。
但若是經常舐唇、易流汗或塗抹不足，即使使用防曬係數高的產品，仍要頻繁補擦，且厚厚塗抹至足夠量，才能達到理想的防曬效果。
Sun protection effect application frequency and application amount are the key The Food and Drug Administration pointed out that sunscreen products often use SPF and PA to indicate the sunscreen effect of the product, which is designed to prevent short-wave UVB and long-wave UVA from ultraviolet rays. SPF is a sun protection index for UVB. SPF15 means that it can extend the time of sunburn and sunburn by 15 times; SPF50 is 50 times longer. PA is a protection index that blocks UVA, which represents the ability to delay skin tanning. Its value is represented by “+”, up to 4 + signs, which is also the concept of multiples to delay tanning. However, if you lick your lips frequently, sweat easily or do not apply enough, even if you use a product with a high SPF, you still need to apply it frequently and apply it thick enough to achieve the ideal sun protection effect.Choose a sunscreen lip balm several key points to keep in mind The principle of action of sunscreen ingredients is divided into physical and chemical properties. The physical effect is less likely to cause allergies, but the disadvantage is that it is prone to whitening and thickening; the chemical effect is more refreshing and not greasy after use, but you should pay attention to sensitivity or irritation. The Food and Drug Administration reminds you to choose products with complete labels when purchasing, pay attention to the precautions and usage methods, and use them up as soon as possible within the validity period; if you use sunscreen lip balm with touch-up effect and fragrance, it should be cleaned and avoid ingredients Stay on the lips for too long and caus
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