We propose “oral skincare” through a mouthwash developed by a pharmaceutical and skincare researcher. Just 1–2 mL of oil spreads smoothly in the mouth, addressing dryness, stickiness, and morning discomfort. Unlike traditional oil pulling, it requires only a small amount of oil, making it easy to continue every day as a “new self-care habit.” This is the world’s first formulation concept for an oil mouthwash that spreads effectively with such a small amount (patent pending).