A first-degree burn is a mild burn affecting only the outer layer of the skin. It typically causes redness, pain, and slight swelling, similar to a sunburn. The skin may feel dry and sensitive to touch but it does not blister. First-degree burns usually heal on their own within a week without scarring, and treatment involves cooling the burn with cold water, applying soothing lotions or aloe vera, and keeping the area clean and protected.

英語での「first-degree burn」の定義と意味

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