What are Non-Communicable Diseases?
They don't spread from person to person. They build up quietly, over decades.
NCDs build up gradually inside the body, shaped by genetics, environment and everyday habits, which is why they're also called chronic diseases.
Regular, early action can change where these diseases go.
Most NCDs take 10–30 years to show symptoms. That's exactly why early habits and early screening matter so much.
Four disease groups account for the overwhelming majority of NCD illness and death. They share a small set of common, modifiable risk factors, which is exactly why prevention against one of them tends to reduce risk across all of them at once.
How an NCD usually develops
- 1Healthy habitsBalanced food, activity, sleep, no tobacco
- 2Risk factors appearWeight, blood pressure or sugar start to creep up
- 3Silent damageArteries, kidneys and nerves are affected, with no symptoms
- 4SymptomsChest pain, breathlessness, thirst, fatigue
- 5ComplicationsHeart attack, stroke, kidney failure, disability
Because they progress silently, NCDs are best addressed long before any symptoms appear. Regular screening, informed lifestyle choices and, where needed, early medical guidance work far better than waiting to treat them once they're established.
The essentials, in four cards
Where NCDs come from, what they are, and why acting early pays off. Hover a card for the key points, open it for the full picture.
Where They Come From
NCDs result from a mix of genetic, physiological, environmental and behavioural factors. There is no single cause, which is why prevention works on many fronts at once.
- Genetic
- Physiological
- Environmental
- Behavioural
The Four Main Types
Cardiovascular disease, cancer, chronic respiratory disease and diabetes account for the vast majority of NCD illness and death worldwide.
- Cardiovascular disease
- Cancers
- Chronic respiratory disease
- Diabetes
Shared Risk Factors
Tobacco use, unhealthy diet, physical inactivity and harmful alcohol use drive most NCDs. Controlling these four cuts risk across every disease at once.
- Tobacco
- Unhealthy diet
- Physical inactivity
- Harmful alcohol use
Why Early Action Matters
Because NCDs build silently for decades, the habits and screenings of your 20s and 30s do more to protect your 60s than any treatment can later on.
- Silent build-up
- Screening works
- Lifestyle change works
- Premature deaths
Characteristics of NCDs
Six traits that set non-communicable diseases apart.
Symptoms build gradually, often over many years.
Learn more →Once present, they typically stay for life.
Learn more →Ongoing management, not a one-time cure.
Learn more →Many cases can be delayed or avoided entirely.
Learn more →Usually shaped by daily habits and surroundings.
Learn more →You cannot catch an NCD from another person.
Learn more →Major NCDs at a Glance
Eleven conditions responsible for most NCD-related illness and death. Hover a card for a summary, open it for the full picture: definition, types, signs, causes, prevention and treatment.
Heart Disease
The leading cause of NCD deaths worldwide, largely preventable through lifestyle change.
Hypertension
Often silent, high blood pressure quietly damages the heart, brain and kidneys.
Diabetes
A metabolic condition that's rising fast — but manageable and often preventable.
Stroke
A medical emergency where every minute counts; prevention starts with risk control.
Cancer
Many cancers are linked to modifiable risks like tobacco, diet and inactivity.
Respiratory Disease
Long-term lung conditions worsened by smoking, pollution and poor air quality.
Chronic Kidney Disease
Often develops silently alongside diabetes and high blood pressure, slowly reducing kidney function.
Liver Disease
Fatty liver linked to obesity and poor diet can quietly progress to serious liver damage over time.
Musculoskeletal Disorders
Joint and bone conditions like arthritis and osteoporosis that reduce mobility as we age.
Obesity
Excess weight is a root driver of heart disease, diabetes and several cancers — and it's rising fast worldwide.
Mental Health
Depression and anxiety are now leading causes of disability worldwide, and closely linked to physical NCD risk.
What shapes your health?
Health isn't down to any one factor. It's the sum of everything below, together making up the full 100%.
Based on the widely-cited Population Health determinants model (McGinnis et al., 2002; County Health Rankings).
Common misconceptions
Four things people commonly get wrong about NCDs. Hover or tap a card to reveal the fact.
Know your own risk, not just the averages.
Our free assessment takes about 5 minutes and suggests tests worth discussing with your doctor.
