Diagnosaurus
- Back pain, low
- Back pain and cough
- Back pain and fever
- Back pain and weight loss
- Bacteremia
- Balance, lack of
- Baldness
- Bedsores
- Belching
- Bell's palsy
- Biliary obstruction
- Bilirubin increased
- Bipolar disorder
- Bitemporal hemianopsia
- Bleeding, general approach
- Blindness, acute
- Blindness, chronic
- Blindness, fleeting
- Blistering diseases
- Blood pressure, elevated
- Blurry vision, acute
- Blurry vision, chronic
- Bone, avascular necrosis
- Bone metastases
- Bone pain
- Bone tumors
- Brachial plexus neuropathy
- Bradycardia
- Bradycardia, relative
- Brain abscess
- Brain mass in HIV/AIDS
- Brain metastases
- Brain tumors (brain mass)
- Breast enlargement, male
- Breast lump or mass
- Breast pain
- Breath, bad
- Bronchial obstruction
- Bronchitis, acute
- Bruising, easy
- Bruit
- Bullae
- BUN increased with normal GFR
- Burping