- Back Pain
- Bacterial Infections
- Balance Disorders see Dizziness & Vertigo
- Balanitis see Male Yeast Infection
- Bariatric Surgery see Gastric Bypass
- Basal Cell Carcinoma see Skin Cancer
- Bedbugs
- Bee Sting
- Behcets Syndrome
- Bells Palsy
- Bextra
- Bile Duct Diseases see Gall Bladder Diseases
- Binge Eating see Anorexia
- Biofilms
- Biotechnology
- Bioterrorism
- Bird Flu
- Birth Defects see Genetic Disorders
- Birthmarks see Hemangioma
- Black Widow Spiders
- Blood Diseases
- Blood Poisoning see Sepsis / Septicemia
- Body Lice see Lice
- Bone Diseases
- Bone Loss see Osteoporosis
- Botox
- Bovine Spongiform Encephalopathy see Mad Cow Disease
- Brain Aneurysm see Aneurysm
- Brain Attack see Stroke
- Brain Pictures
- Brain Tumor
- Break-bone fever see Dengue Fever
- Breast Cancer
- Breastfeeding
- Bronchial Asthma see Asthma
- Bronchitis
- Brown Recluse Spiders
- BSE see Mad Cow Disease
- Bubonic Plague
- Bunions
- Bursitis