Health

Health is about how well our bodies and minds are working. It means being strong, feeling good, and not having illnesses or injuries. When we are healthy, our bodies function properly, and we can play, learn, and enjoy life.

We can help our health in many ways. Doing regular physical exercise, like playing sports or walking, is great for our bodies. Getting enough sleep each night also helps us stay healthy. On the other hand, things like smoking or feeling too much stress can hurt our health.

Some parts of health are up to us, like choosing not to do risky things. But other parts depend on things around us, like whether we can easily see a doctor when we are sick. Even some health problems are caused by things we cannot change, like genetics. Understanding health helps us take better care of ourselves and each other.

History

The idea of health has changed over time. Early ideas focused on the body working well, without sickness or injury. In 1948, the World Health Organization (WHO) offered a new way to think about health. They said health is not just about not being sick, but also about feeling good in body, mind, and social life.

Since then, health has been seen as a tool that helps people live well. It means being strong enough to handle stress, learn new things, and keep good relationships. Programs like Healthy People in the United States aim to improve health by setting goals and focusing on ways to stay healthy. Many things affect health, including where we live, how we live, and our everyday choices.

Determinants

See also: Social determinants of health and Risk factor

The place and conditions where a person lives greatly affect their health and happiness. Health isn't just about medicine; it's also about how we live our lives and the choices we make. The World Health Organization says that a person's health depends on their social and economic situation, their environment, and their own behaviors and traits.

Important factors that influence health include where people live, their daily habits, and the support they receive from their community. For example, having clean water, safe housing, and good healthcare can help people stay healthy. Studies have shown that living near nature and getting enough exercise can also improve health.

The way we live our lives, such as getting enough sleep, eating well, and avoiding harmful activities like smoking, plays a big role in staying healthy. Even people who have health problems can still feel healthy and happy.

The environment around us—like air quality, water, and where we live—also affects our health. Clean air and water, safe neighborhoods, and access to nature all help people stay healthy, especially children.

Genetics, or traits passed down from parents, can also affect health. This includes both the risk of certain diseases and the habits families share. For example, some families may be more likely to have weight-related health issues.

Potential issues

Many health problems are common around the world. Diseases like heart disease, cancer, diabetes, and lung disease affect millions of people each year. Other diseases, like HIV, tuberculosis, and malaria, also cause many deaths.

Not having enough food, especially for young children, is another big health problem. Many children suffer because they don't have enough nutritious food to grow properly.

Injuries, such as broken bones or burns, can also affect health and quality of life. Lifestyle choices, like smoking, poor diet, not enough exercise, and lack of sleep, can lead to health problems. Some health issues are also passed down through families.

Unfortunately, many people around the world don't have access to good healthcare, which makes it harder to stay healthy.

Mental health

Main article: Mental health

The World Health Organization says mental health is about feeling well and able to handle everyday life, work, and contribute to the community. It's not just about not having a mental illness.

Mental health problems can affect how a person thinks, feels, and behaves. Common disorders include schizophrenia, ADHD, depression, bipolar disorder, anxiety, and autism. These can make it hard to live daily life.

Factors that can lead to mental health problems include family history, biological factors like brain chemistry, and life experiences such as trauma.

Maintaining

Achieving and keeping good health is an ongoing process. It depends on both how we learn about health and on personal choices and community actions that help us stay healthy.

Diet

See also: List of nutrition guides

Eating a healthy diet is very important for staying healthy. A good diet includes many different foods from plants and animals that give our bodies the nutrients they need. These nutrients give us energy and help keep our bodies working well. They help build strong bones, muscles, and other parts of our bodies and also help control how our bodies work, like keeping our blood pressure just right. Water is important for helping our bodies grow, make new cells, and stay healthy. We get some foods, called macronutrients, in large amounts — such as proteins, carbohydrates, and fats. Others, called micronutrients — like vitamins and minerals — we need in smaller amounts, but they are still very important for our bodies. Guides like the food guide pyramid show us how much of each type of food we should eat to stay healthy. Choosing healthy foods can help prevent heart disease and some kinds of cancer, and it can also help us keep a healthy weight.

The Mediterranean diet is often linked with good health, perhaps because it includes helpful plant compounds such as phenolic compounds, isoprenoids and alkaloids.

Exercise

Main article: Exercise

Physical exercise helps keep our bodies strong and healthy. It makes our bones and muscles stronger and helps our heart and blood system work better. Experts say there are four main kinds of exercise: endurance, strength, flexibility, and balance. Doing exercise can lower the chances of getting heart disease, cancer, diabetes, high blood pressure, and other health problems. It’s best to start slowly and build up, but even small activities like walking or standing up while talking on the phone can be good for us.

Sleep

Main articles: Sleep and Sleep deprivation

Getting enough sleep is very important for our health. For children, sleep also helps them grow and develop. Not getting enough sleep can make it easier to get sick and can slow down healing. Studies show that people who sleep less than seven hours a night are more likely to catch colds than those who sleep seven or more hours. Not sleeping well can also affect weight and may even be linked to some health problems later in life. Experts say that getting the right amount of sleep for our age is important for staying healthy.

Role of science

Health science is the study of how our bodies work and how to keep them healthy. It includes learning about biology, chemistry, physics, and other subjects to understand health and to find ways to prevent and treat diseases. Health science uses knowledge from many areas, such as biology, biochemistry, physics, and epidemiology. It applies this knowledge in fields like health education, biomedical engineering, and public health. Health professionals, including doctors, nurses, nutritionists, and others, use this science to help people stay healthy. Some work with individuals, while others focus on whole communities.

Health care

Modern medicine usually happens within health care systems, which are organized by governments and sometimes helped by groups like churches. These systems decide how medical care is given and who can receive it. Many countries provide health care for everyone, making sure that all people can get the care they need, no matter their ability to pay. This is often done through systems where the government or a single organization pays for health care, or through private or cooperative health insurance.

Most societies that are not very advanced may not have health care for everyone. In these places, people can only get care if they can pay for it themselves, or if they have insurance through their job or other means.

Being open about health information is also important. When people can learn about health conditions, treatments, and costs, they can make better choices about their care. Some health systems are working to share more information, though they must also protect private details and prevent misuse.

Delivery

See also: Health care, clinic, hospital, and hospice

Medical care is given in three main ways.

Primary care is the first kind of medical help people get. It is usually provided by doctors, nurse practitioners, or other health workers in places like doctor’s offices, clinics, schools, or even people’s homes. Most visits to doctors are for primary care, which includes treating both new and ongoing health problems, giving preventive care, and teaching people how to stay healthy.

Secondary care is given by medical specialists. People are sent to these doctors or clinics by their primary care provider when they need special kinds of care. This can include surgeries, special tests, or treatments that only certain doctors can give.

Tertiary care is the most advanced kind of medical care. It is given in special hospitals or centers that have very advanced equipment and doctors who are experts in very difficult cases. This kind of care is used for very serious injuries, complicated illnesses, or treatments that are not available in most hospitals.

Modern health care also depends on information, which used to be kept on paper but is now often stored and shared electronically.

In places where money is tight, modern health care can be expensive. Some researchers suggest removing fees to make sure everyone can get care, although even then there are still many challenges.

Role of public health

Main article: Public health

See also: Global health

Public health is about keeping whole communities healthy. It focuses on preventing diseases, injuries, and other health problems before they happen. Public health workers look at how healthy groups of people are and find ways to improve that health. They work in many areas, such as studying how diseases spread, helping people live healthier lives, and making sure that environments are safe.

Public health actions include teaching people about healthy behaviors, creating rules to protect health, giving out medicines and supplies to stop diseases, and doing research to learn more about health. For example, vaccination programs and giving out items to prevent the spread of diseases are important public health activities. Public health also tries to make sure that everyone, no matter where they live, has a fair chance to be healthy. This includes helping mothers and children, organizing health services, preparing for emergencies, and working to stop both infectious and long-term diseases.

Because of public health efforts, life expectancy — the average number of years people live — has increased around the world. For example, in the United States, people live about thirty years longer than they did in 1900, and worldwide, life expectancy has gone up by six years since 1990.

Self-care strategies

Main article: Self care

See also: Chronic care management, Social relation, and Stress management

Keeping good health also depends on what we do every day. This includes taking care of our bodies, like washing and brushing our teeth, eating safe food, and getting enough sleep. It also means watching how we feel and making choices that help us stay healthy. For example, noticing that we feel tired and deciding to try a different pillow at night can help us sleep better.

Our health is also connected to how we interact with others. Having good friendships, helping others by volunteering, and being part of a community can make us feel happier and live longer. Studies show that older people who volunteer often live longer and feel better mentally than those who do not. People who volunteer also tend to have better thinking skills, fewer feelings of sadness, and more satisfaction with life.

Long periods of stress can hurt our health. It can affect how our brains work, make us more likely to feel sad, and even make diseases worse. Managing stress means finding ways to lower stress or become better at handling it. This can include relaxing our bodies, using our minds to stay calm, and learning new skills like solving problems and managing our time. These skills help us feel less stressed when we face challenges.

Occupational

Main article: Occupational safety and health

Many jobs can have risks that may cause health problems. Some jobs can lead to diseases like lung conditions, such as silicosis or coal worker's lung disease, and breathing problems like asthma. Workers might also face skin issues or other health concerns like hand and wrist problems.

As more jobs involve sitting and less physical work, new health challenges have arisen, like weight gain and stress. Many countries have groups to help protect workers' health and safety, such as the Health and Safety Executive in Britain and organizations in the United States that study and create rules to keep workers safe.