Non-thermal Plasma for Sebum Reduction in Oily Facial Skin

Inclusion Criteria: 1. Persons aged 19 to 40 years who are determined to have oily skin type. Skin types were classified based on the sebum measurements by using measured using a Sebumeter® (SM815; Courage+Khazaka Electronic GmbH, Cologne, Germany) according to the manufacturer's guidelines as follows: \> 220 μg/cm2 on forehead and \> 180 μg/cm2 on cheeks, oily type; 100-220 μg/cm2 on forehead and 70-180 μg/cm2 on cheeks, normal type; \< 100 μg/cm2 on forehead and \< 70 μg/cm2 on cheeks, dry type. 2. People with mild acne-like skin whose upper limit is Grade 1 (Few lesions; No nodules, papules/pustules less than 1, few comedones) and Grade 2(Mild; No nodules, papules/pustules less than 5, some comedones) of the Korean acne severity system 3. Persons who skin color of type I to III according to Fitzpatrick skin type 4. Persons who do not have inflammatory skin diseases on the facial skin 5. Persons who have heard the purpose and contents of a clinical trial and voluntarily signed the consent form prior to the clinical trial 6. Persons who can be monitored during a clinical trial period Exclusion Criteria: 1. Persons who do not want this study or do not write a consent form 2. Persons who have a history of hypertrophic scars, keloids, etc. 3. Persons who have been using retinoid formulations within the last 1 month due to excessive sebum secretion or acne 4. Persons who have a history of receiving treatments such as lasers or fillers on your face within the last 1 month 5. Persons who is pregnant or lactating, or have a pregnancy plan within the expected trial period 6. Other cases in which the study is considered difficult due to the judgment of the principal investigator