| Topic | Description |
|---|---|
| A&E | A&E, casualty |
| Abortion | Termination of pregnancy |
| Abscess | Pus-filled swelling |
| Accident and emergency departments | A&E, casualty |
| Accidents and first aid | Emergency first aid |
| Accidents to children in the home | Child safety at home |
| Acid reflux | Acid reflux, GORD |
| Acne | Inflammatory skin disorder |
| Acoustic neuroma | Non-cancerous growth in the head |
| Actinomycosis | Bacterial infection sometimes called ‘lumpy jaw’ |
| Acupuncture | Complementary therapy using needles and pressure points |
| Addictions | Physical dependence on something |
| Addison's disease | Disease of the adrenal glands |
| Adenoids and adenoidectomy | Operation to remove the adenoids |
| ADHD | Commonly abbreviated to ADHD |
| Agoraphobia | Anxiety attacks caused by open spaces, public places |
| AIDS and HIV | HIV |
| Air embolism | Air bubbles in the blood, also known as the bends |
| Alcohol misuse | Addiction to alcohol |
| Allergies | Serious reaction to an allergen |
| Alopecia | Alopecia |
| Altitude sickness | Acute mountain sickness |
| Alzheimer's disease | Mental deterioration due to physical changes in the brain |
| amblyopia | Amblyopia |
| Ambulance Service |
National ambulance service |
| Amenorrhoea | Amenorrhoea |
| Amniocentesis | A diagnostic test carried out during pregnancy |
| Amoebiasis | Infection caused by contaminated food |
| Anaemia | Group of disorders affecting red blood cells |
| Anaesthesia | Pain relief for patients during tests or surgery |
| Anal fissure | A tear in the lining of the wall of the anus |
| Anal fistula | Abscess near the anus |
| Analgesics | Analgesics |
| Anaphylaxis | Also called anaphylactic shock |
| Androgen insensitivity syndrome | AIS |
| Aneurysm | A swelling in part of an artery | Angina | Chest pain caused by insufficient blood flow to the heart |
| Angioedema | Swelling of the deep layers of skin | Animal bites | A bite from an animal or a human |
| Ankylosing spondylitis | Long-term condition affecting the spine |
| Anxiety | GAD, Generalised anxiety disorder |
| Aphasia | Brain disorder affecting language and communication |
| Appendicitis | Inflammation of the appendix | Arthritis | Painful conditions of the joints |
| Asbestosis | Serious long-term lung condition |
| Aspergillosis | Fungal infection |
| Asthma | Chronic lung disorder | Astigmatism | An eye focusing problem |
| Atherosclerosis | Narrowing of the arteries |
| Athlete's foot | Tinea pedis, fungal infection of the feet. |
| Atopic eczema | Atopic eczema |
| Atrial fibrillation | Fast and irregular heart beat |
| Audiometry | Audiometry |
| Autistic spectrum disorder | A lifelong condition that affects how the brain functions |
| Avian flu | Bird flu |