The Cucumber Face Pack

Cucumber (oi, 오이) is the cool, crisp end of the Korean table: salted for oiji, dressed for oi-muchim, stuffed for oi-sobagi. Its other image, slices laid over closed eyes, is more familiar from films than from any Korean source I found. This page separates what is documented from what is lore.

What the sources document: cucumber water

The Encyclopedia of Korean Culture describes miansu (미안수, 美顔水), a liquid applied after washing the face to whiten and moisturize, roughly the job a toner or lotion does today. Among the plant ingredients it lists, cucumber was the most widely used and was considered the most effective. The entry gives three ways to prepare it: boiling the flesh and straining the liquid, catching the steam from the pot, or juicing freshly cut cucumber, sometimes with a little boric acid or alcohol added. Other plants in the same entry include gourd sap and boiled luffa. The entry does not say when cucumber water began, though it suggests miansu in general may reach back to the early Three Kingdoms period. See Joseon cosmetics for the larger picture of a beauty routine built from garden plants.

What I could not document

I could not find a Korean reference source that describes a cucumber face pack or a slices-on-the-eyes habit as an old Korean ritual. The encyclopedia's entry on the cucumber covers botany, growing and cooking and mentions no use on the skin. Newspaper and brand copy sometimes call cucumber masks a Korean tradition, but I could not check those claims, so this page does not repeat them. What can be said is that cucumber on the skin is an old and widespread idea: a 2025 review of Mediterranean plants in skin and hair care lists raw cucumber as a folk remedy in Italy for wrinkles, pimples and redness. That is a record of traditional use, not a test.

What the research shows

The Encyclopedia of Korean Culture says the fruit is about 95 percent water and a source of vitamins A, C, B1 and B2. That describes eating it. A slice laid on skin has not been shown to deliver those nutrients in any amount that matters. The one practical effect with a sound basis is cold. Cleveland Clinic lists refrigerated cucumber slices among the cold items, with chilled tea bags and cold spoons, that may help with under-eye bags, and says a cold, damp washcloth works by narrowing blood vessels. Its guidance is for temporary relief, and swelling that lasts more than a day or two should be seen by an eye-care professional. I found no controlled trial of cucumber on skin or eyes, so the safest reading is that a cold slice is a cold compress that happens to smell fresh.

Making one at home

There is no standard recipe, and none is needed. If you like the habit, chill thin slices and rest them briefly over closed eyelids, or dab cold cucumber water on the face as miansu was used. Wash the cucumber first, keep your hands clean, and use it the same day.

Evidence status

• Traditional use: cucumber water as a facial lotion is documented in the Encyclopedia of Korean Culture. A cucumber pack or eye slices as a long-standing Korean ritual: not documented in the sources reviewed.
• Skin evidence: no clinical trial found. Cold is the likely active ingredient for puffiness.
• Practical note: patch-test juice or grated cucumber on the inner arm first, keep fresh juice out of the eyes, and do not hold cold on the skin around the eyes for long stretches.