Health: The Ultimate Treasure · Lesson 5 of 8
Non-Communicable and Lifestyle-Related Diseases
“Understand deficiency, chronic, and lifestyle-related diseases and how long-term risk factors differ from infectious causes.”
• Explain why non-communicable diseases do not spread like infections. • Distinguish lifestyle-related, deficiency, and chronic disease ideas used in the chapter. • Describe risk factors associated with diabetes, obesity, high blood pressure, and cancer. • Interpret signs, symptoms, and lifestyle changes in a health survey. • Explain why a risk factor increases likelihood without guaranteeing that a person will develop a disease.
Not Every Disease Comes From an Infection
Non-communicable diseases are not passed from one person to another through pathogens. Their causes can involve lifestyle, diet, environment, body processes, inherited tendencies, age, or several factors acting together. This is why prevention and management usually focus on long-term habits, early detection, medical care, and reducing risk factors rather than isolation from other people.
The chapter notes that non-communicable diseases such as diabetes, heart disease, and cancer have become more common in India. It connects this rise with changes such as greater consumption of processed food, less physical activity, and longer lifespans, and identifies non-communicable diseases as a major cause of death.
A disease that is not caused by an infectious pathogen and does not spread from person to person like an infection.
Deficiency Diseases
Some non-communicable diseases develop when the diet does not supply enough of a particular nutrient. These are deficiency diseases. The chapter recalls examples studied earlier, such as scurvy, anaemia, and goitre. The important idea is not to memorise a list but to recognise the pattern: a missing or insufficient nutrient can interfere with normal body function.
A disease that develops because the body does not receive enough of a particular nutrient over time.
Chronic Disease and Long-Term Care
Some diseases persist for a long time and may need regular treatment or monitoring. The chapter describes diseases such as cancer, diabetes, and asthma as conditions that may continue for more than three months and can be considered chronic. Long duration does not mean the disease is contagious; it means the condition persists and often requires continuing care.
A disease or health condition that persists for a long period, often for months or longer, and may require ongoing care.
Diabetes as a Lifestyle-Related Health Problem
Diabetes is increasingly common among adults and also occurs in children. The chapter emphasises that it can develop through a combination of factors rather than one simple cause. These may include hormonal imbalance, unhealthy eating habits, lack of physical activity, overweight or obesity, and other biological influences. Common signs or symptoms listed in the chapter include frequent urination, excessive thirst, weight loss, tiredness, and slow healing.
| Condition | Information supplied in the source activity | What students are asked to investigate |
|---|---|---|
| Obesity | Balanced diet and regular exercise are given as suggested lifestyle changes. | Observe or research common signs and other helpful changes using reliable health sources. |
| Diabetes | Frequent urination, excessive thirst, weight loss, tiredness, and slow healing are listed. | Find suitable lifestyle changes with help from a doctor, nurse, health worker, teacher, or trusted source. |
| High blood pressure | The table names the condition but leaves details for students to complete. | Investigate signs or symptoms and suitable lifestyle changes using reliable health guidance. |
Risk Factors Are Not Guarantees
A risk factor is something associated with a greater chance of disease, but it does not mean that every exposed person will become ill. For example, tobacco use, unhealthy diet, lack of physical activity, or pollution can increase the risk of certain diseases, yet individual outcomes differ. Good science separates 'increases risk' from 'always causes'.
Lifestyle-related does not mean a disease is simply the person's fault. Biology, environment, access to healthy food and safe spaces, inherited factors, age, stress, and other conditions can also affect risk.
Learning From a Community Health Survey
A useful way to study non-communicable disease is to ask which conditions are common in a community, what signs or symptoms are associated with them, and what lifestyle changes may help prevent or manage them. Reliable information should come from trained health workers, doctors, teachers, books, or trusted health sources. The purpose is to understand patterns, not to diagnose neighbours.
Investigate three common lifestyle-related health conditions in your neighbourhood. For each one, record the condition, common signs or symptoms, and one or more lifestyle changes suggested by a qualified health professional or reliable source. Do not use the activity to diagnose individuals.
Kamal Ranadive (1917–2001) was a pioneering Indian biomedical researcher. The chapter highlights her research on links among hormones, certain viruses, and cancer, as well as work showing how tobacco, diet, and pollution can raise cancer risk.
Quiz
Which statement best describes a non-communicable disease?
Which is an example of a deficiency disease mentioned in the chapter?
What does 'chronic' mainly describe?
Which combination is listed as contributing to diabetes risk?
Why is it more accurate to call tobacco use a risk factor for some diseases rather than a guarantee?
Practice Problems
- Explain the difference between a communicable disease and a non-communicable disease using one example of each.
- Why are scurvy, anaemia, and goitre grouped as deficiency diseases rather than infectious diseases?
- Write a short explanation of why diabetes may need long-term management even though it is not contagious.
- Create a small survey table for obesity, diabetes, and high blood pressure with columns for signs or symptoms and helpful lifestyle changes.
- Explain the difference between a cause, a contributing factor, and a risk factor in the context of non-communicable disease.
Key Takeaways
• Non-communicable diseases are not spread by infectious pathogens. • Deficiency diseases result from insufficient nutrients. • Chronic diseases persist for long periods and may need continuing care. • Diabetes, obesity, high blood pressure, and some cancers are influenced by several biological, lifestyle, and environmental factors. • Risk factors increase the chance of disease but do not guarantee the same outcome for everyone.