Non-Infectious Diseases: Types, Causes & Prevention
Non-infectious diseases are health conditions that do not normally spread from one person to another. They are also called Non-infectious diseases (NCDs) or chronic diseases. Many of these conditions last for long durations and may need ongoing care. NCDs can develop because of a combination of genetic, Physical, environmental, and Observable factors. Common examples include heart disease, stroke, cancer, chronic Breathing diseases, and diabetes. These conditions are an important public health concern. They affect people in every region and can reduce quality of life. Some can also lead to premature deaths when risk factors are not addressed or when care is delayed. What Are Non-Infectious Diseases? Non-infectious diseases are conditions that are not caused by infectious pathogens and do not normally pass from person to person. The term noncommunicable disease is often used for chronic conditions that last for a long time. The four main NCD groups are: These groups include many different health conditions. For example, cardiovascular diseases include heart attacks and strokes, while chronic Breathing diseases include asthma and chronic obstructive pulmonary disease (COPD). Main Types of Non-Infectious Diseases Cardiovascular Diseases Cardiovascular diseases affect the heart and blood vessels. They include coronary heart disease, heart attacks, and strokes. Several factors can increase the risk of cardiovascular disease. These include tobacco use, physical inactivity, unhealthy diets, high blood pressure, high blood glucose, high cholesterol, overweight or obesity, harmful use of alcohol, and air pollution. Cancer Cancer is a group of diseases involving abnormal cell growth. There are many different types of cancer, and each type can affect a different part of the body. Risk factors vary by type of cancer. Tobacco use, alcohol use, unhealthy diets, physical inactivity, and air pollution are among the factors linked with cancer and other NCDs. Chronic Respiratory Diseases Chronic respiratory diseases affect the airways and lungs. Asthma and COPD are common examples. Tobacco smoke and air pollution are important risk factors. Some people may also face risks from workplace or environmental exposures. Diabetes Diabetes is a chronic condition that affects how the body handles blood glucose. It is one of the four main groups of NCDs. There are different types of diabetes. Type 2 diabetes is one of the most common forms. Physical inactivity and unhealthy diets can contribute to risk factors linked with diabetes and other NCDs. Causes and Risk Factors There is usually no single cause behind an NCD. Several factors, including genetics, behaviour, physical conditions, and the environment, can influence risk. Behavioural Risk Factors WHO identifies four major behavioural risk factors for NCDs: These behaviours can contribute to changes in the body, including high blood pressure, increased blood glucose, overweight or obesity, and abnormal blood lipids. Poor nutrition can be an important part of this picture. An unhealthy diet can contribute to several metabolic risk factors linked with NCDs. Metabolic Risk Factors Some physical changes are also important risk factors. They include: High blood pressure is a major risk factor for cardiovascular disease and other health problems. Many people with hypertension do not notice symptoms, so regular blood pressure checks can be important. Environmental Risk Factors The environment can also affect NCD risk. Air pollution is an important environmental risk factor. Other exposures, including some chemicals, radiation, and workplace hazards, may also affect health. Prevention and Control NCD prevention focuses on reducing risk factors that can be changed. Important steps include: These measures are part of wider prevention and control efforts. Public health programs also play an important role by supporting healthier environments and improving access to healthcare. Prevention does not mean every chronic illness can be avoided. Some risk factors cannot be changed. Genetics, age, and other biological factors can also influence a person’s risk. Diagnosis and Management Early detection, screening, and treatment are important parts of NCD care. The type of testing depends on the condition. Management also varies. Some people may need medicines, regular monitoring, lifestyle changes, or other medical care. The goal is to control the condition and reduce the risk of complications. For example, high blood pressure can often be detected through a simple blood pressure check. If it is not treated, it can increase the risk of heart disease, stroke, and kidney disease. People with symptoms, known risk factors, or an existing chronic condition should speak with a qualified healthcare professional for individual advice. How Do NCDs Affect Quality of Life? A chronic illness can affect daily life in different ways. The impact depends on the condition, its severity, and the care a person receives. Some people may need regular medical visits or long-term treatment. Others may need to make changes to their daily routine. Good management can help people live with chronic conditions while reducing health risks. Early detection and access to appropriate care are important parts of NCD management. Non-Infectious vs Communicable Diseases The main difference is how the conditions are caused and spread. Communicable diseases can be caused by infectious agents and may spread from person to person or through other routes. Non-infectious diseases do not normally spread between people. They are linked to a combination of genetic, physiological, environmental, and behavioural factors. This difference is important because the prevention approach is also different. Communicable diseases may require measures such as infection control, while NCD prevention focuses strongly on risk factors, early detection, treatment, and healthy environments. Frequently Asked Questions What are 10 examples of non-infectious diseases? Examples include heart disease, stroke, cancer, asthma, COPD, diabetes, coronary heart disease, hypertension, and other conditions within the major NCD groups. What are the four main NCDs? The four main groups are cardiovascular diseases, cancers, chronic respiratory diseases, and diabetes. What are the major risk factors for NCDs? Major behavioural risk factors include tobacco use, physical inactivity, unhealthy diet, and harmful use of alcohol. Air pollution is also an important environmental risk factor. Is high blood pressure a non-infectious disease? Yes. High blood pressure, also called hypertension, is a noncommunicable condition and an important metabolic risk factor for cardiovascular disease. Is Type 2
Asthma: Symptoms, Causes, Types, Treatment & Management
Asthma is a long-term condition that affects the airways in the lungs. The airways can become inflamed and narrowed, which can make it harder for air to move through them. Asthma symptoms may come and go and can become worse after exposure to certain triggers. Common asthma symptoms include wheezing, coughing, shortness of breath, and chest tightness. Symptoms can vary from person to person and may become worse during respiratory infections, after exercise, with allergies, or in cold air. Although there is no cure for asthma, treatment and an individualized asthma action plan can help control symptoms and manage flare-ups. What Is Asthma? Asthma is a chronic condition that affects the airways, which are the tubes that carry air in and out of the lungs. In people with asthma, the airways can become inflamed and narrowed. The muscles around the airways may also tighten, and the airways can produce more mucus. These changes can make breathing more difficult. Asthma symptoms do not always occur continuously. They may come and go over time or within the same day. Different people can have different symptoms and triggers, so asthma management is generally tailored to the individual. Types and Patterns of Asthma Asthma can occur in different patterns and may be associated with particular situations or triggers. Rather than treating these as completely separate diseases, healthcare professionals may describe asthma according to its pattern or the circumstances in which symptoms occur. Allergic Asthma Allergic asthma is associated with allergens such as pollen, dust mites, and mold. Symptoms can become worse when a person is exposed to allergens that trigger their asthma. Exercise-Induced Asthma Some people develop asthma symptoms during or after physical activity. Exercise can trigger or worsen symptoms, although people with asthma may still be able to remain physically active when their condition is appropriately managed. Occupational Asthma Occupational asthma develops or becomes worse because of exposures in the workplace. Possible workplace triggers include dust, mold, chemicals, fumes, and other substances. Adult-Onset Asthma Some people do not develop noticeable asthma symptoms until adulthood. This is known as adult-onset asthma. The exact causes of asthma can differ from person to person. Symptoms of Asthma Common symptoms of asthma include: Asthma symptoms may follow certain patterns. They can start or become worse during viral infections such as a cold, after exercise, with allergies, or in cold air. Other conditions can cause similar symptoms, so these symptoms alone cannot confirm that someone has asthma. What Causes Asthma? The exact causes of asthma are not fully known and may differ between individuals. Researchers recognize that different factors can affect how the lungs develop and how the body responds to substances or infections. Asthma can begin during childhood, although some people do not develop noticeable symptoms until adulthood. It is important to distinguish causes from triggers. A trigger is something that sets off asthma symptoms or makes existing symptoms worse. A trigger does not necessarily mean that it caused the person to develop asthma. Common Asthma Triggers Asthma triggers vary from person to person. Common triggers include: Certain medicines, acid reflux, and weather conditions can also trigger symptoms in some people. Identifying personal triggers can help people work with a healthcare professional on an appropriate asthma management plan. What Is an Asthma Attack? An asthma attack, also called an asthma flare-up, occurs when asthma symptoms become worse. During an attack, the airways can become more narrowed and inflamed, making breathing more difficult. Warning signs can include worsening coughing, wheezing, chest tightness, and shortness of breath. An asthma action plan can explain how to recognize worsening symptoms, which medicines to use, and when medical care is needed. When Is Asthma an Emergency? A serious asthma attack can require urgent medical attention. Follow the person’s prescribed asthma action plan when symptoms become worse. Emergency care may be necessary when symptoms do not improve soon after using prescribed at-home medicine or when the asthma attack is serious. Severe breathing difficulty can require treatment in an emergency department. People with asthma should discuss their emergency instructions with a healthcare professional and keep their written asthma action plan available. How Is Asthma Diagnosed? Asthma diagnosis usually involves looking at symptoms, medical history, and physical examination. Healthcare professionals may also use lung-function tests to assess breathing. Spirometry is commonly used to measure how much air a person can breathe out and how quickly they can do so. Peak-flow measurements may also be used in some situations. Allergy testing or other tests may be considered when needed to identify contributing factors or investigate other possible causes of breathing symptoms. Because other conditions can cause coughing, wheezing, or breathing difficulties, symptoms should be evaluated by a healthcare professional rather than being assumed to be asthma. Asthma Treatment and Management Asthma treatment depends on factors such as the person’s symptoms, age, how serious the condition is, and how they respond to medicines. Treatment aims to control symptoms and reduce asthma attacks. Quick-Relief Medicines Quick-relief or reliever medicines can help ease symptoms during an asthma attack. Some reliever medicines work by opening narrowed airways so that air can flow more easily. People who use an inhaler should learn the correct technique because using an inhaler incorrectly can affect how well the medicine works. A healthcare professional can provide instructions based on the prescribed inhaler. Long-Term Control Medicines Some people need regular controller medicines to help prevent symptoms and asthma attacks. Inhaled corticosteroids are among the medicines used for long-term asthma control because they reduce inflammation in the airways. Other treatments may be prescribed depending on the person’s asthma and response to treatment. Medicines should be taken according to the treatment plan provided by a healthcare professional. How Can You Reduce Asthma Symptoms? Managing asthma involves understanding personal triggers, following the prescribed treatment plan, and monitoring symptoms. Helpful parts of asthma management may include: Some people may also use a peak-flow meter as part of their asthma action plan. Keeping a record of peak-flow readings and asthma