How to prevent: Blood vessels dilate when the temperature drops―the reason many people get flushed noses after romping outside. Since sun exposure can also cause redness, wear plenty of SPF 30 sunblock, even in the dead of winter. Try Kiehl’s Sun Protection Lotion SPF 30 ($19.50, kiehls.com). Wear a ski mask when outdoors for prolonged periods. “It’s best to create a physical barrier,” Felderman says.
How to treat: Flushed features should fade soon after you come indoors. To speed up the process, apply a warm―not hot―compress to the skin for a few minutes.
When to see a professional: If redness persists―especially if it’s accompanied by whiteheads or visible blood vessels―seek medical treatment for rosacea, a form of acne. A dermatologist can prescribe antibiotics or perform a laser treatment to reduce the appearance of blood vessels or redness.