It’s generally said that diet and stress cause acne, but there are specific reasons that these two factors give us flareups. Because acne is an inflammatory skin condition, “anything that increases inflammation can trigger or worsen acne,” explains Peterson Pierre, MD, of the Pierre Skin Care Institute. “Stress releases pro-inflammatory hormones in the body and high-sugar foods can also increase inflammation in the body. These rules aren’t universal, of course, but can contribute to acne.”

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