Mayo Clinic specialists answer health questions from readers like you.

• Baby teeth: When do children start to lose them?
• Back labor: What is it?
• Back pain relief: Ergonomic chair or fitness ball?
• Bacterial infection vs. viral infection: What's the difference?
• Bad breath: Could a tongue scraper help?
• Barrel chest: What causes it?
• Bell's palsy: Will local anesthetic worsen it?
• Bellamine for hot flashes: An effective nonhormonal treatment?
• Belly-dancing: A good exercise for weight loss?
• Beta blockers: Are they safe if you have asthma?
• Beta blockers: Can they cause weight gain?
• Beta blockers: How do they affect target heart rate?
• Bioidentical hormones: Are they better than standard HRT?
• Bipolar disorder and alcoholism: Are they related?
• Bipolar disorder in children: How early can it be diagnosed?
• Bipolar disorder treatment: A cause of hypothyroidism?
• Bipolar disorder treatment: What role do antidepressants play?
• Bipolar disorder: Can it be misdiagnosed as depression?
• Bipolar disorder: Coping with a loved one's mental illness
• Bird flu: Can you get it from eating chicken?
• Birth control pills: Harmful in early pregnancy?
• Birth control pills: How long can I take them?
• Bitter orange: Helpful or harmful weight-loss supplement?
• Black, hairy tongue
• Bladder infections: Can men get them too?
• Bladder outlet obstruction: Causes in men?
• Bleeding after menopause: Is it normal?
• Bleeding after sex: Is this normal?
• Bleeding ulcer: What are the symptoms?
• Blighted ovum: What are the causes?
• Blocked tear duct: What causes it?
• Blood clots during menstruation: A concern?
• Blood in semen
• Blood in urine
• Blood poisoning (bacteremia)
• Blood pressure always higher at home: What does it mean?
• Blood pressure medication: Can I stop taking it if I lose weight?
• Blood pressure medications: Can they raise my triglycerides?
• Blood pressure: Can it be higher in one arm?
• Blood pressure: Does it have a daily pattern?
• Blood pressure: Is it affected by weather?
• Blood sugar and mood: Any connection?
• Blood thinners: Can I still get blood clots?
• Blood type diet: Does it offer health benefits?
• BMI: Is it accurate for weightlifters?
• Body fat analyzers: How accurate are they?
• Body fat: Where does it go when you lose weight?
• Body shape: Does it increase your risk of diabetes?
• Bone bruise: How long before it heals?
• Bone cyst
• Botox injections: Can they relieve arthritis pain?
• Bottled water and cavities: Is there a link?
• Bow hunter's stroke: What causes it?
• Boy or girl: Can you choose naturally?
• Breakfast: Why is it so important?
• Breast calcifications: Are they breast cancer?
• Breast cancer surgery: Does menstrual timing affect prognosis?
• Breast cancer treatment: Do I need chemotherapy?
• Breast cysts and caffeine: Any connection?
• Breast implants: Do they interfere with mammograms?
• Breast lift vs. breast augmentation: What's the difference?
• Breast rash: Could it be inflammatory breast cancer?
• Breast thermography: Can it detect breast cancer?
• Broken collarbone (fractured clavicle)
• Broken ribs
• Broken toe: How is it treated?
• Bronchial thermoplasty: A new asthma treatment?
• Bronchiectasis
• Bronchiolitis obliterans with organizing pneumonia (BOOP)
• Bronchitol: A new treatment for cystic fibrosis?
• Brugada syndrome: What are the signs and symptoms?
• Bruit: Is it a sign of something serious?
• Bulging disk: How is it different than a herniated disk?
• Bump on the head: When is it serious?
• Burning feet: Causes and treatments?
• Butter vs. margarine: Which is better for my heart?
• Buying a mattress: Does firmness matter?
• Buying a treadmill: What should I look for?
• Buying beef? A guide to choosing the leanest cuts
• Byetta: Effective diabetes and weight-loss drug?