Introduction to Health and Illness

Health and illness are dynamic concepts central to nursing practice. Nurses must understand not only disease processes but also how individuals perceive, respond to, and adapt to health changes.

🌿 Concept of Health

📖 Definitions of Health

🟢 WHO Definition

According to the World Health Organization:

“Health is a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity.”

🔍 Key Points:

• Health is holistic (not just physical)

• Includes well-being, not just absence of illness

• Dynamic and continuously changing

🌈 Dimensions of Health

1. Physical Health

• Proper functioning of body systems

• Example: Normal BP, absence of disease

2. Mental Health

• Ability to think clearly and make decisions

• Emotional stability

3. Social Health

• Ability to maintain relationships

• Effective communication

4. Emotional Health

• Managing feelings like anger, stress, happiness

5. Spiritual Health

• Beliefs, values, purpose of life

6. Intellectual Health

• Ability to learn, reason, and think critically

🧠 Maslow’s Hierarchy of Needs

Developed by Abraham Maslow

🔺 Levels (Bottom → Top)

1. Physiological Needs

• Oxygen, food, water, sleep

• Top priority in nursing care

2. Safety Needs

• Protection, security, stability

• Example: Safe hospital environment

3. Love and Belonging

• Family, relationships, affection

4. Esteem Needs

• Self-respect, confidence, recognition

5. Self-Actualization

• Achieving full potential

🧾 Nursing Application:

• Prioritize care from basic to higher needs

• Example: Treat breathing before emotional counseling

⚖️ Health–Illness Continuum

📊 Concept:

Health is not static; it lies on a spectrum.

Range:

High-level wellness → Good health → Illness → Severe illness → Death

🔍 Features:

• Dynamic process

• Individuals move along continuum daily

• Influenced by lifestyle and environment

🧾 Nursing Role:

• Promote movement toward wellness

• Prevent deterioration

🌍 Factors Influencing Health

1. Biological Factors

• Age, genetics, sex

• Example: Hereditary diseases

2. Environmental Factors

• Pollution, sanitation, climate

• Example: Air pollution → respiratory diseases

3. Lifestyle Factors

• Diet, exercise, habits (smoking, alcohol)

4. Socioeconomic Status

• Income, education, occupation

5. Cultural Factors

• Beliefs, traditions, health practices

6. Psychological Factors

• Stress, emotions, mental health

7. Healthcare Services

• Availability and accessibility of care

⚠️ Causes and Risk Factors for Developing Illness

🦠 Causes of Illness

1. Biological Causes

• Bacteria, viruses, parasites

2. Nutritional Causes

• Deficiency or excess (e.g., anemia, obesity)

3. Physical Causes

• Injury, trauma, temperature extremes

4. Chemical Causes

• Poisoning, toxins

5. Genetic Causes

• Congenital disorders

⚡ Risk Factors

🔹 Modifiable Risk Factors

• Smoking

• Alcohol use

• Sedentary lifestyle

• Poor diet

🔹 Non-Modifiable Risk Factors

• Age

• Gender

• Genetics

🧾 Example:

• Hypertension risk = obesity + stress + family history

🤒 Illness

📌 Definition:

Illness is a subjective feeling of being unwell.

🧩 Types of Illness

1. Acute Illness

• Sudden onset, short duration

• Example: Fever, infection

2. Chronic Illness

• Long-term, slow progression

• Example: Diabetes, hypertension

3. Subacute Illness

• Between acute and chronic

4. Latent Illness

• Present but not visible

🧠 Illness Behavior

📖 Definition:

How a person perceives, evaluates, and responds to symptoms.

🔍 Stages:

1. Symptom Experience

   • Person feels something is wrong

2. Assumption of Sick Role

   • Accepts being ill

3. Medical Care Contact

   • Seeks professional help

4. Dependent Patient Role

   • Accepts treatment

5. Recovery/Rehabilitation

   • Returns to normal life

💥 Impact of Illness on Patient

🧍 Physical Impact

• Pain, weakness, disability

🧠 Psychological Impact

• Anxiety, depression, fear

👨‍👩‍👧 Social Impact

• Isolation, role changes

💰 Economic Impact

• Loss of income, treatment expenses

🧾 Behavioral Impact

• Lifestyle changes, dependency

🩺 Nursing Implications

• Provide holistic care (body + mind + social)

• Educate patients about risk factors

• Promote healthy lifestyle

• Support psychological adaptation

• Encourage family involvement

📌 Quick Summary Table

Concept	Key Idea
Health	Holistic well-being
Dimensions	Physical, mental, social, etc.
Maslow	Needs hierarchy
Continuum	Health is dynamic
Factors	Biological, social, environmental
Illness	Subjective experience
Impact	Physical + psychological + social