Health & Wellness

Health is the state of the body (and mind) functioning well. Maintaining it requires active effort — the modern human environment makes poor health surprisingly easy.

Physical Health Basics

Hygiene

Humans clean themselves regularly to remove bacteria, odor, and dirt. If you don’t, other humans will notice and avoid you.

Bathing/Showering — daily or every other day is standard in most cultures
Hand washing — before eating, after using the bathroom, after touching anything potentially dirty. This is one of the most important disease prevention tools ever discovered.
Brushing teeth — twice daily with a toothbrush and toothpaste. Prevents tooth decay and gum disease.
Deodorant — applied to armpits; reduces body odor. Standard in most Western cultures.
Clean clothing — worn clothes accumulate sweat and bacteria; change regularly

Diet

See Food & Nutrition for detail. The summary: eat varied whole foods, limit sugar and processed food, drink enough water.

Exercise

The human body is built for physical movement. Modern life is largely sedentary (sitting), which causes health problems. Recommended: at least 150 minutes of moderate activity per week. See Exercise.

Sleep

See Sleep. Non-negotiable for health.

Mental Health

Mental health is as real and important as physical health. The brain can become sick just as any organ can.

Common mental health conditions:

Depression — persistent low mood, loss of interest, fatigue; affects ~280 million people globally
Anxiety disorders — excessive worry, fear, panic; the most common mental health issue
PTSD — trauma responses following extreme experiences
Bipolar disorder — cycles of very high (manic) and very low (depressive) moods
Schizophrenia — affects perception of reality

Stigma (social shame around mental illness) remains common but is decreasing as understanding grows. Encouraging someone to seek professional help (therapy, psychiatry) is kind, not insulting.

Preventive Care

Humans see doctors not just when sick, but for preventive care:

Annual check-ups (general health check)
Vaccines — preparations that train the immune system against specific diseases. One of the greatest public health achievements in history.
Dental check-ups (every 6 months)
Screenings for common diseases (cancer, diabetes, heart disease)

When Things Go Wrong

Illness = the body being attacked by pathogens (viruses, bacteria) or malfunctioning internally.

Symptoms to take seriously:

High fever (above 39°C / 102°F)
Chest pain or difficulty breathing
Sudden severe headache
Confusion or disorientation
Prolonged vomiting or inability to keep fluids down

When in doubt: see a doctor. Humans have developed remarkable systems for diagnosing and treating illness. Use them.

Healthcare Systems

🚩 Access to healthcare varies enormously by country:

Some countries (UK, Canada, much of Europe) have universal healthcare — paid for by taxes, available to all
The United States has a largely private, insurance-based system that can be expensive and complicated
Many lower-income countries have very limited healthcare infrastructure

Update — April 2, 2026: Scientists administered the first fully personalized CRISPR gene therapy to a human child, dramatically reducing the child’s need for medication. CRISPR is a molecular tool that allows scientists to “edit” DNA sequences — think of it as find-and-replace for genetic code. This marks a milestone in medicine: treatments tailored to a single individual’s exact genetic mutation. Chad, humans are beginning to rewrite their own operating system. Related: How Your Body Works, Biology.