- Balanitis
- Barrett's oesophagus
- Bartholinitis
- Bernard (horner) syndrome
- Big animal bite
- Bipolar affective disorder
- Bladder cancer
- Bleaching
- Bleeding, Vaginal
- Blepharitis
- Bone and articular cartilage
- Bowel cancer
- Brain stem stroke syndrome
- Brain tumour
- Breast
- Breathing problem
- Bronchial cancer
- Bronchiectasis
- Bronchitis
- Brucellosis
- Burkitt lymphoma
- Burns
- Burns - general