脂溢性皮膚炎

Seborrheic dermatitis

脂溢性皮膚炎（Seborrheic dermatitis）也稱為脂漏性皮膚炎，是一種好發於皮脂腺較豐富，常見皮脂溢出的臉部、頭皮及軀幹（胸部或背部）等部位的慢性或亞急性炎症皮膚疾患，屬於中醫的「面遊風」、「白屑風」等範疇。若發生在新生兒時期，通常有個專有名詞稱為「搖籃帽」（Cradle cap）。因為常有一片片油脂斑塊或鱗屑片長在剛出生的嬰兒頭皮上，雖然實際上也可能長在其他區域，如耳朵後面、頸部的皺紋隙縫、腋下及包尿布區。嬰兒脂溢性皮膚炎發生的原因，一般認為和成人不同，雖然目前兩者病因都是不明確，而且大多數在九個月後會逐漸改善消失。但是成人罹患脂溢性皮膚炎卻常纏綿不癒，反覆發作，尤其是發生在頭面部區域。在初、中期的感染發炎明顯時，可藉由中藥或西藥的治療得到明顯的改善，但是卻容易復發，並且多次復發後往往纏綿不癒。可見當進入慢性期或復發期時，糠秕馬拉色癬菌感染已經不是致病的唯一主因，臨床的診治是很大的挑戰，卻是中醫的擅場。藉由實證醫學的研究文獻，提供並探討中醫治療的理論和方法。

Seborrheic dermatitis is an inflammatory condition in which the skin overproduces skin cells and sebum, the skin's natural oil. Seborrheic dermatitis usually occurs in areas of the body that have many oil-producing glands, including the scalp, face, upper chest, and back. In infants, seborrheic dermatitis of the scalp is often called 'cradle cap.' This causes redness and greasy scales, most commonly on the scalp, but also on the face, ears, neck, and in the diaper area. Although it is unlike in adults, the cause of infantile seborrheic dermatitis is not clearly defined as well. Besides, cradle cap is usually appears within the first 6 weeks of life. The condition may slowly resolve itself over a few weeks whilst in others it may continue for 6 to 9 months or much longer. Although the symptoms of seborrheic dermatitis can be effectively controlled with drugs or herbal medicine therapy for a span of time, recurrent and lingering conditions often occurred. It is thought that infection is far from the only causality in this troublesome condition. We can find the effective therapies proved by some clinical trials with traditional medicine from evidence-medicine database.