With the dip in temperatures this week, the wind, cold, and low humidity could possibly mean chapped lips, flaky skin, dry cough, nosebleeds, mild headaches and, oh yes, acne. All these could be outward signs that your body needs more fluid. A mere 2 percent drop in the body’s water volume can set off dizziness, muscle cramps, fatigue and problems focusing on your computer. Some of the newer government guidelines advise people to drink half their body weight daily — but in ounces instead of pounds. So, if you weigh 140 pounds, you should ideally consume 70 ounces (about 9 cups) of water a day to start. Then add more for other activities.