In Myeongdong: Olive Young Myeongdong Town (53 Myeongdong-gil, 1F–2F) or

Myeongdong (14 Myeongdong 8-gil), 10am–10:30pm. The MD Red Itch care cream (495ml) has 6,484 reviews at 4.9. Bottles this big can't go in your carry-on, so pack them in checked luggage.