- Calluses and corns
- Campylobacter
- Cancer
- Cardiac arrest
- Cardiology
- Carpal tunnel syndrome
- Cataract
- Cellulitis
- Cervical cancer
- Cervical ectropion
- Cervical polyps
- Cervical screening
- Chemotherapy
- Chest infections
- Chest pain
- Chest x-ray
- Chickenpox
- Childhood cancer – long term follow up
- Childhood immunisation
- Chlamydia
- Cholesterol & how to lower it
- Cholesterol testing
- Chronic bronchitis
- Chronic fatigue syndrome
- Chronic kidney disease
- Chronic obstructive pulmonary disease
- Chronic pain
- Coeliac disease
- Cold or the flu?
- Cold sores
- Colic
- Colonoscopy
- Colposcopy
- Concussion
- Condoms (for men)
- Cone biopsy
- Congenital heart disease
- Congenital heart disease – children
- Conjunctivitis
- Constipation
- Constipation in children
- Contact lenses
- Contraception
- COPD
- Coronary angiography
- Coronary artery bypass surgery
- Coronary heart disease
- Cough in adults
- Cough in children
- Crohn's disease
- Croup
- CRP test
- Crying baby
- CT scan
- Cuts, scratches and grazes
- CVDRA – Cardiovascular disease risk assessment
- Cystic fibrosis
- Cystitis