- B12 deficiency
- Baker's cyst
- Bicarbonate
- Bipolar disorder
- Birthmarks
- Bladder stones
- Blepharitis
- Blisters
- Blood poisoning
- Body odour
- Body piercing
- Boils
- Bone cyst
- Brain death
- Breast implants
- Breast lump
- Breast reduction
- Bronchiectasis
- Bronchitis
- Bronchodilator drugs
- Bulimia
- Bunion
- Bursitis
- Botulism
- Brain tumour
- Bile duct cancer
- Breast abscess
- Blood clot
- Bladder cancer
- Blood donation
- Blood tests
- Blood transfusion
- Blood pressure (high)
- Bromodosis (smelly feet)
- Biopsy
- Bacterial vaginosis
- Balanitis
- Behcet's disease
- Blood groups
- Bone cancer (sarcoma)
- Beta blockers
- Bilharzia
- Back pain
- Barium enema
- Bedwetting
- Bell's palsy
- Blood pressure (low)
- Blushing
- Bone marrow donation
- Bottle feeding
- Brain abscess
- Breastfeeding
- Broken bones
- Bronchiolitis
- Bone marrow transplant
- Bad breath
- Bowel transplant
- Burns and scalds
- Bed sores
- Bends
- Bleeding gums
- Birth control
- Blindness
- Bone densitometry scan
- Brain haemorrhage
- Brittle bones
- BSE
- Bartholin's cyst
- Breast pain, cyclical
- Breast cancer (female)
- Breast cancer (male)
- Babies crying
- Babies, weaning
- Bowel cancer
- Bites, insect
- Bites, human and animal
- Bites, snake
- Binge eating
- Bird flu