Overview
Obesity is a chronic medical condition characterized by excessive body fat accumulation that can negatively affect overall health.
It is commonly assessed using Body Mass Index (BMI), where a BMI of 30 or higher is classified as obesity.
Common Risk Factors
Obesity is a complex condition that results from an imbalance between calorie intake and energy expenditure, influenced by genetic, behavioral, environmental, and medical factors.
1. Lifestyle & Behavioral Factors
- Excess calorie intake (high-fat, high-sugar, processed foods)
- Overeating and large portion sizes
- Sedentary lifestyle (low physical activity)
- Lack of regular exercise
- Poor sleep patterns
- Emotional or stress-related eating
2. Genetic & Biological Factors
- Family history of obesity
- Genetic predisposition affecting metabolism and appetite regulation
- Hormonal imbalances
3. Medical Conditions
- Hypothyroidism
- Polycystic ovary syndrome (PCOS)
- Cushing’s syndrome
- Metabolic disorders (e.g., type 2 diabetes, fatty liver disease)
4. Medications
- Corticosteroids
- Antidepressants
- Antipsychotics
- Some anti-seizure medications
- Insulin and certain diabetes medications
5. Psychological Factors
- Depression and anxiety
- Stress-related eating habits
- Binge eating disorder
6. Environmental & Socioeconomic Factors
- Busy lifestyle and limited time for exercise
- Lower socioeconomic status affecting food choices
Obesity usually results from multiple interacting factors rather than a single cause. Identifying and addressing these risk factors is essential for effective prevention and management.
Symptoms
Obesity is primarily identified by excess body fat but is also associated with multiple physical and functional symptoms.
1. Physical Signs
- Excess body weight and increased body fat, especially abdominal
- BMI ≥ 30
- Increased waist circumference
- Fat accumulation in hips, thighs, and upper body
2. Functional Symptoms
- Fatigue and low energy
- Shortness of breath on exertion
- Reduced exercise tolerance
- Excessive sweating
3. Musculoskeletal Symptoms
- Joint pain (knees, hips, lower back)
- Difficulty in walking or movement
- Increased risk of osteoarthritis
4. Skin-Related Changes
- Stretch marks (striae)
- Darkened skin patches (acanthosis nigricans)
5. Associated Health Complaints
- High blood pressure
- Type 2 diabetes
- Sleep apnea and sleep disturbances
- Heartburn or acid reflux
Obesity affects multiple body systems, and early recognition helps prevent serious complications.
Diagnosis
1. Body Mass Index (BMI)
- 18.5–24.9: Normal weight
- 25–29.9: Overweight
- ≥ 30: Obesity
- Class I: 30–34.9
- Class II: 35–39.9
- Class III: ≥ 40
2. Waist Circumference
- Men: >102 cm (increased risk)
- Women: >88 cm (increased risk)
3. Clinical Evaluation
- Medical history
- Physical examination
- Lifestyle and medication review
- Assessment of comorbidities
4. Screening for Associated Conditions
- Diabetes mellitus
- Hypertension
- Hyperlipidemia
- Fatty liver disease
- Metabolic syndrome
Treatment
1. Lifestyle Modifications
- Calorie-controlled balanced diet
- Portion control
- 150–300 minutes exercise per week
- Mindful eating and food journaling
- Improved sleep patterns
2. Medical Management
Prescription weight-loss medications may be used in selected patients with BMI ≥30 or ≥27 with comorbidities.
3. Management of Underlying Conditions
- Diabetes mellitus
- Hypertension
- Hyperlipidemia
- Hypothyroidism
- PCOS
4. Bariatric Surgery
Includes gastric bypass, sleeve gastrectomy, and gastric banding. Recommended for BMI ≥40 or ≥35 with comorbidities.
5. Long-Term Follow-Up
- Regular monitoring of weight and BMI
- Nutritional counseling
- Lifestyle support
- Prevention of weight regain
When to Seek Medical Advice
1. Weight Concerns
- BMI ≥ 30
- Rapid weight gain
- Difficulty losing weight
2. Health Problems
- High blood pressure
- High blood sugar or diabetes risk
- High cholesterol
- Joint pain or mobility issues
3. Breathing & Sleep Issues
- Shortness of breath
- Sleep apnea symptoms
- Daytime fatigue
4. Physical Limitations
- Difficulty daily activities
- Low energy
- Reduced exercise tolerance
5. Failure of Lifestyle Measures
- No improvement after 3–6 months
- Repeated weight cycling
Early medical consultation helps prevent complications and ensures safe weight management.
