- B Vitamins
- Babesiosis see Tick Bites
- Baby Blues see Postpartum Depression
- Baby Care see Infant and Newborn Care
- Baby Health Checkup
- Back Injuries
- Back Pain
- Bacteremia see Sepsis
- Bacterial Infections
- Bacterial Vaginosis see Vaginitis
- Bad Breath
- Baker's Cyst see Knee Injuries and Disorders
- Balance Problems
- Balanitis see Penis Disorders
- Bariatric Surgery see Weight Loss Surgery
- Barotrauma
- Barrett's Esophagus see Esophagus Disorders
- Basal Cell Carcinoma see Skin Cancer
- Basedow's Disease see Hyperthyroidism
- Bed Bugs
- Bedsores see Pressure Sores
- Bee Stings see Insect Bites and Stings
- Behcet's Syndrome
- Belching see Gas
- Bell's Palsy
- Bellyache see Abdominal Pain
- Benefits of Exercise
- Benign Prostatic Hypertrophy see Enlarged Prostate (BPH)
- Benign Tumors
- Bereavement
- Berry Aneurysm see Brain Aneurysm
- Bi-polar Disorder see Bipolar Disorder
- Bicycle Safety see Sports Safety
- Bile Duct Cancer
- Bile Duct Diseases
- Biliary Cirrhosis see Bile Duct Diseases
- Biliary Tract Diseases see Bile Duct Diseases; Gallbladder Diseases
- Binge Drinking see Alcohol Use Disorder (AUD)
- Binge Eating see Eating Disorders
- Biodefense and Bioterrorism
- Bioethics see Medical Ethics
- Biological Weapons see Biodefense and Bioterrorism
- Biopsy
- Bioterrorism see Biodefense and Bioterrorism
- Biotin see B Vitamins
- Bipolar Disorder
- Bird Flu
- Birth Control
- Birth Defects
- Birth Injuries see Childbirth Problems
- Birth Weight
- Birthmarks
- Black Widow Spider Bites see Spider Bites
- Bladder Cancer
- Bladder Control see Urinary Incontinence
- Bladder Diseases
- Bladder Infections see Urinary Tract Infections
- Bladder Pain Syndrome see Interstitial Cystitis
- Bleeding
- Bleeding Disorders
- Bleeding, Gastrointestinal see Gastrointestinal Bleeding
- Blepharospasm see Eyelid Disorders
- Blindness see Vision Impairment and Blindness
- Blisters
- Blood
- Blood Cells see Blood; Blood Count Tests
- Blood Clots
- Blood Clots in the Lung see Pulmonary Embolism
- Blood Coagulation Disorders see Bleeding Disorders; Hemophilia
- Blood Count Tests
- Blood Disorders
- Blood Donation see Blood Transfusion and Donation
- Blood Glucose
- Blood Platelet Disorders see Platelet Disorders
- Blood Poisoning see Sepsis
- Blood Pressure see High Blood Pressure; Low Blood Pressure; Vital Signs
- Blood Pressure Medicines
- Blood Sugar see Blood Glucose
- Blood Tests see Blood Count Tests; Laboratory Tests
- Blood Thinners
- Blood Transfusion and Donation
- Blood-Borne Pathogens see Infection Control; Occupational Health for Health Care Providers
- BMI see Body Weight; Weight Control
- Body Art see Piercing and Tattoos
- Body Contouring see Plastic and Cosmetic Surgery
- Body Lice
- Body Odor see Germs and Hygiene; Sweat
- Body Weight
- Bone Cancer
- Bone Density
- Bone Diseases
- Bone Grafts
- Bone Infections
- Bone Loss see Bone Density; Osteoporosis
- Bone Marrow Diseases
- Bone Marrow Transplantation
- Bone Transplantation see Bone Grafts
- Borderline Personality Disorder see Personality Disorders
- Botanicals see Herbal Medicine
- Botox
- Botulinum Toxin see Botox; Botulism
- Botulism
- Bovine Spongiform Encephalopathy see Creutzfeldt-Jakob Disease
- Bowel Incontinence
- Bowel Movement
- Bowel Obstruction see Intestinal Obstruction
- BPH see Enlarged Prostate (BPH)
- Braces, Oral see Orthodontia
- Brachial Plexus Injuries
- Brachytherapy see Radiation Therapy
- Bradycardia see Arrhythmia
- Brain Aneurysm
- Brain Attack see Stroke
- Brain Cancer see Brain Tumors
- Brain Concussion see Concussion
- Brain Diseases
- Brain Disorders, Inborn Genetic see Genetic Brain Disorders
- Brain Hemorrhage see Hemorrhagic Stroke
- Brain Injury see Concussion
- Brain Malformations
- Brain Tumors
- Break-bone Fever see Dengue
- Breast Cancer
- Breast Cancer, Male see Male Breast Cancer
- Breast Diseases
- Breast Implants see Breast Reconstruction; Plastic and Cosmetic Surgery
- Breast Reconstruction
- Breast Reduction see Plastic and Cosmetic Surgery
- Breastfeeding
- Breath Odor see Bad Breath
- Breathing Problems
- Breathing Rate see Vital Signs
- Broken Bones see Fractures
- Bronchial Asthma see Asthma
- Bronchial Disorders
- Bronchiectasis see Bronchial Disorders
- Bronchiolitis see Bronchial Disorders; Respiratory Syncytial Virus Infections
- Bronchitis see Acute Bronchitis; Chronic Bronchitis
- Bronchogenic Carcinoma see Lung Cancer
- Bronchopneumonia see Pneumonia
- Brown Recluse Spider Bites see Spider Bites
- Bruises
- Bruxism see Tooth Disorders
- BSE see Creutzfeldt-Jakob Disease
- Bubonic Plague see Plague
- Bulimia see Eating Disorders
- Bullous Pemphigoid see Pemphigus
- Bullying and Cyberbullying
- Bunions see Toe Injuries and Disorders
- Burns
- Burping see Gas
- Bursitis
- Bypass Surgery see Coronary Artery Bypass Surgery
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