Mayo Clinic specialists answer health questions from readers like you.

• Waist-to-hip ratio: A risk factor for heart disease?
• Walking pneumonia: What does it mean?
• Walking poles: Good way to maximize a daily walk?
• Walking: Is it enough for weight loss?
• Warfarin (Coumadin) diet: Which foods should I avoid?
• Warfarin (Coumadin) interactions: Which supplements should I avoid?
• Warfarin: Any harm in long-term use?
• Warm-mist vs. cool-mist humidifier: Which is better for a cold?
• Water after meals: Does it disturb digestion?
• Water exercise for arthritis: Does pool temperature matter?
• Water exercise: Any benefit to osteoporosis?
• Water retention: Are there any natural diuretics?
• Water softeners: How much sodium do they add?
• Watery eyes (constant tearing) in older adults
• Weight loss: Better to cut calories or exercise more?
• Weight loss: Does drinking milk help?
• Weight training: Are free weights or machine weights better?
• Weight-loss exercise: How do I fit it into my day?
• Weight-loss hypnosis: Does it work?
• Weight-loss surgery: Safe for kids?
• Weighted hula hoops: Exercise gimmick or good idea?
• Weightlifting belt: Do I need one?
• Weightlifting: Bad for your blood pressure?
• Weightlifting: Before or after an aerobic workout?
• Weightlifting: Should I alternate muscle groups?
• West Nile virus: What are the long-term health effects?
• White patch on skin: A cause for concern?
• White stool: Should I be concerned?
• White tongue: What causes it?
• White whole-wheat bread: Is it good for me?
• White, numb fingers: What causes this?
• Whitening toothpaste: Does it actually whiten teeth?
• Whole body vibration training: An effective workout?
• Whole grains: Good for diabetes prevention?
• Wilson's syndrome: Is it an accepted medical diagnosis?
• Wrist blood pressure monitors: Are they accurate?