Давайте определимся, что такое себорея:
Seborrheic dermatitis is a papulosquamous disorder patterned on the sebum-rich areas of the scalp, face, and trunk. In addition to sebum, this dermatitis is linked to Malassezia, immunologic abnormalities, and activation of complement.
Исходя из того, что мы знаем о причинах, соответственно и лечение:
Medical Care: Early treatment of flares is encouraged. Behavior modification techniques in reducing excoriations are especially helpful with scalp involvement.
Topical corticosteroids may hasten recurrences, may foster dependence because of a rebound effect, and are discouraged except for short-term use. Skin involvement responds to ketoconazole, naftifine, or ciclopirox creams and gels. Alternatives include calcineurin inhibitors (ie, pimecrolimus, tacrolimus), sulfur or sulfonamide combinations, or propylene glycol. Class IV or lower corticosteroid creams, lotions, or solutions can be used for acute flares. Systemic ketoconazole or fluconazole may help if seborrheic dermatitis is severe or unresponsive.
Dandruff responds to more frequent shampooing or a longer period of lathering. Use of hair spray or hair pomades should be stopped. Shampoos containing salicylic acid, tar, selenium, sulfur, or zinc are effective and may be used in an alternating schedule. Overnight occlusion of tar, bath oil, or Baker's P&S solution may help to soften thick scalp plaques. Derma-Smoothe F/S oil is especially helpful when widespread scalp plaques are present. Selenium sulfide (2.5%), ketoconazole, and ciclopirox shampoos may help by reducing Malassezia yeast scalp reservoirs. Shampoos may be used on truncal lesions or in beards but may cause inflammation in the intertriginous or facial areas.
Seborrheic blepharitis may respond to gentle cleaning of eyelashes with baby shampoo and cotton applicators. The use of ketoconazole cream in this anatomical region is controversial.
Поскольку себорея часто связана и с грибковой инфекцией, то в лечение добавляются и противогрибковые препараты.
Я бы могла сослаться сама на себя в лечении себореи

(у нас дерматологи подключаются только в очень тяжелых случаях себореи, в осн. ее лечат педиатры и / или семейные врачи), но, чтобы не быть голословной, вот Вам ссылка: http://www.emedicine.com/derm/topic396.htm.
Буду признательна, если обоснуете применение этилового спирта и др. сушащих кожу препаратов на основе этой информации.
