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Don鈥檛 Let Altitude Sickness Ruin Your Mountain Vacation. Heed This Doctor鈥檚 Tips to Avoid It.

At 5,000 to 7,000 feet, you can expect a little trouble catching your breath. Up higher, though, you may get a pounding headache and more. Here鈥檚 what to do鈥攁nd not do鈥攖o avoid problems on your mountain vacation.