Digestive system
Anal fistula
Non-infectious · Chronic
A small tunnel between the inside of the anus and the skin near it, usually after an anal abscess.
GeoMed · Disease encyclopedia
Disease encyclopedia
Causes, symptoms, diagnosis, treatment approaches and prevention for common conditions. Browse A–Z, by body system, or search.
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Disease encyclopedia
Digestive system
Digestive system
Anal warts
Infectious · Chronic
Small growths in and around the anus caused by the human papillomavirus (HPV), usually spread through sexual contact.
Cardiovascular system
Angina
Non-infectious · Chronic
Chest pain or discomfort caused by reduced blood flow to the heart muscle, usually brought on by exertion and relieved by rest.
Musculoskeletal system
Ankylosing spondylitis
Non-infectious · Chronic
A long-term inflammatory arthritis that mainly affects the spine and pelvis, causing back pain and stiffness that improve with movement.
Mental health
Anorexia nervosa
Non-infectious · Chronic
A serious eating disorder in which a person restricts food intake because of an intense fear of gaining weight, leading to dangerously low body weight.
Blood (haematology)
Antiphospholipid syndrome
Non-infectious · Chronic
An autoimmune condition in which antibodies make the blood more likely to clot, causing thrombosis and pregnancy complications.
Cardiovascular system
Aortic coarctation in adults
Non-infectious · Chronic
A narrowing of the aorta, present from birth, that may only be found in adulthood, often because of high blood pressure in the arms.
Cardiovascular system
Aortic regurgitation
Non-infectious · Chronic
A leaky aortic valve that lets blood flow back into the heart, making the heart work harder over time.
Cardiovascular system
Aortic stenosis
Non-infectious · Chronic
Narrowing of the aortic valve that restricts blood flow out of the heart, most often caused by age-related calcium build-up.
Mouth and teeth
Aphthous stomatitis (recurrent)
Non-infectious · Chronic
Recurrent mouth ulcers that appear as painful round sores inside the mouth and heal on their own.
Blood (haematology)
Aplastic anaemia
Non-infectious · Chronic
A rare, serious condition in which the bone marrow stops making enough red cells, white cells and platelets.
Cardiovascular system
Arrhythmogenic cardiomyopathy
Non-infectious · Chronic
An inherited heart muscle disease in which muscle is replaced by fat and scar tissue, causing dangerous heart rhythms.
Musculoskeletal system
Arthritis
Non-infectious · Chronic
By 2030, arthritis is expected to affect over 78 million adults in the United States alone." Let that sink in. That’s nearly one in four people grappling with joint pain, stiffness, and swelling. If you’ve watched a loved one, or maybe even yourself, struggle with arthritis, you know it’s more than just an inconvenience. It can be life-altering. But here’s the good news: understanding arthritis, its symptoms, and treatment options can make a world of difference. Whether it’s your grandmother’s swollen hand joints or your own aching knees, there are actionable steps to regain control and improve quality of life. Let’s unpack everything you need to know about arthritis.
Respiratory system
Asbestosis
Non-infectious · Chronic
A long-term lung disease caused by breathing in asbestos fibres, leading to scarring and stiffening of the lungs.
Cardiovascular system
Atherosclerosis
Non-infectious · Chronic
The build-up of fatty plaques inside artery walls, which narrows arteries and is the main cause of heart attacks and strokes.
Immune system
Atopic dermatitis (eczema)
Non-infectious · Chronic
A common long-term skin condition causing dry, itchy, inflamed skin that comes and goes in flare-ups.
Cardiovascular system
Atrial fibrillation
Non-infectious · Chronic
A common heart rhythm disorder in which the upper chambers beat irregularly and often fast, increasing the risk of stroke.
Cardiovascular system
Atrial septal defect
Non-infectious · Chronic
A hole in the wall between the upper chambers of the heart, present from birth, which may not be found until adulthood.