PATIENT EDUCATION
Obesity & Weight Management
Obesity is a chronic medical condition influenced by biology, environment, sleep, medicines, lifestyle and other health conditions. Assessment should focus on health risk and sustainable treatment rather than weight alone.
Select a topic below to view more information.
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Progressive Weight Gain
What you'll notice or feel
- Weight increasing over months or years.
- Clothing or waist size increasing.
- Reduced mobility or increasing joint discomfort.
- Sometimes no obvious change in eating habits.
Common causes
- A long-term mismatch between energy intake and expenditure influenced by multiple biological and environmental factors.
- Reduced physical activity, sleep disturbance or stress.
- Medicines that promote weight gain.
- Less commonly, an endocrine disorder contributing to weight gain.
What it could be
- Overweight or obesity requiring metabolic risk assessment.
- Weight gain related to medicines or another health condition.
- Thyroid, cortisol or other endocrine problems when the history suggests them.
Initial self-care
- Track weight no more than periodically if frequent weighing is stressful.
- Focus on regular meals, adequate sleep and gradually increasing activity where safe.
- Avoid extreme diets or unregulated weight-loss products.
- Bring a complete medication list to your appointment.
When to see a doctor urgently
- Rapid weight gain with severe breathlessness or marked leg swelling.
- Weight gain accompanied by severe headache, visual symptoms or major weakness.
When to see a doctor
- Weight gain is persistent despite sustained lifestyle efforts.
- Weight is affecting diabetes, blood pressure, sleep or mobility.
- You suspect a medicine or hormonal condition may be contributing.
Difficulty Losing Weight
What you'll notice or feel
- Initial weight loss followed by regain.
- Repeated dieting without durable benefit.
- Hunger or cravings making calorie restriction difficult.
- Frustration despite regular exercise.
Common causes
- The body adapts biologically to weight loss, increasing hunger and reducing energy expenditure.
- Sleep deprivation, stress and environmental factors.
- PMOS, diabetes, some medicines and other conditions that make weight management harder.
- A plan focused on short-term restriction rather than long-term behaviour.
What it could be
- A need for structured obesity treatment rather than repeated unsupervised dieting.
- Metabolic conditions that should be treated alongside weight management.
- Eligibility for evidence-based anti-obesity medication in selected patients.
Initial self-care
- Use realistic, sustainable changes rather than crash diets.
- Prioritise protein- and fibre-rich foods and regular meal patterns if medically appropriate.
- Build activity gradually around current fitness and joint health.
- Record barriers rather than only calorie numbers.
When to see a doctor urgently
- Seek urgent help for fainting, severe dehydration or persistent vomiting related to dieting or medication.
- Severe abdominal pain or other significant symptoms after starting weight-loss treatment need prompt review.
When to see a doctor
- Repeated cycles of loss and regain are affecting health or wellbeing.
- You want to discuss medical weight-management options.
- You have diabetes, fatty liver disease, sleep apnoea or other weight-related complications.
Snoring, Poor Sleep or Daytime Sleepiness
What you'll notice or feel
- Loud snoring or witnessed pauses in breathing.
- Waking unrefreshed despite enough time in bed.
- Morning headaches or daytime sleepiness.
- Difficulty concentrating.
Common causes
- Obstructive sleep apnoea is more common with excess weight.
- Irregular sleep schedules can also worsen appetite regulation and metabolic health.
- Alcohol, sedating medicines and nasal obstruction may contribute.
What it could be
- Obstructive sleep apnoea requiring formal assessment.
- A sleep disorder contributing to weight gain and metabolic risk.
- Another cause of fatigue if sleep testing is normal.
Initial self-care
- Avoid driving if you are excessively sleepy.
- Keep a regular sleep schedule where possible.
- Reduce alcohol near bedtime.
- Ask a partner about snoring or witnessed breathing pauses if relevant.
When to see a doctor urgently
- Severe breathlessness, chest pain or episodes of collapse.
- Dangerous sleepiness while driving or operating machinery.
When to see a doctor
- Loud snoring plus daytime sleepiness is persistent.
- A partner reports repeated pauses in breathing.
- You have resistant high blood pressure or difficult-to-control diabetes.
High Blood Sugar, Blood Pressure or Fatty Liver
What you'll notice or feel
- Prediabetes or Type 2 diabetes.
- High blood pressure or abnormal cholesterol.
- Fatty liver detected on blood tests or imaging.
- Increased waist circumference.
Common causes
- Insulin resistance and excess visceral fat.
- Genetic susceptibility interacting with weight, diet and physical activity.
- Sleep apnoea and other conditions that worsen metabolic risk.
What it could be
- Metabolic syndrome or multiple cardiometabolic risk factors.
- Type 2 diabetes or prediabetes.
- Metabolic dysfunction-associated steatotic liver disease.
Initial self-care
- Focus on health markers as well as body weight.
- Follow prescribed treatment for blood pressure, lipids or diabetes.
- Gradual weight reduction can improve several metabolic risks.
- Avoid alcohol excess if fatty liver is present.
When to see a doctor urgently
- Chest pain, stroke-like symptoms or severe breathlessness.
- Very high glucose with dehydration, vomiting or confusion.
When to see a doctor
- Several metabolic risk factors are present together.
- Blood pressure, glucose or liver tests are worsening.
- You want a coordinated plan rather than treating each problem separately.
Possible Medication or Hormonal Contribution
What you'll notice or feel
- Weight gain began after starting or changing a medicine.
- Weight gain with easy bruising, muscle weakness or wide purple stretch marks.
- Weight gain with marked fatigue, constipation or cold intolerance.
- Irregular periods, excess hair growth or acne alongside weight gain.
Common causes
- Some psychiatric, neurological, diabetic and steroid medicines can promote weight gain.
- Hypothyroidism can contribute to modest weight gain.
- Cushing syndrome is uncommon but important when typical features are present.
- PMOS often coexists with insulin resistance and weight difficulty.
What it could be
- Medication-associated weight gain.
- Thyroid disease, PMOS or rarely cortisol excess.
- A combination of several factors rather than one single hormonal cause.
Initial self-care
- Do not stop prescribed medicines abruptly.
- Record the timing of weight change relative to new medicines.
- Bring previous thyroid, glucose or hormone results if available.
- Avoid commercial “hormone balancing” products without medical review.
When to see a doctor urgently
- Sudden severe weakness, vomiting or collapse after abruptly stopping long-term steroid medication.
- Severe headache or visual symptoms with other hormonal changes.
When to see a doctor
- Weight gain is rapid or accompanied by clear endocrine symptoms.
- A new medicine appears temporally related to weight change.
- Lifestyle measures alone have not addressed the underlying problem.
YOUR CONSULTATION
What to Expect at Your Visit
- Review of weight history, previous attempts, sleep, eating pattern, physical activity and medicines.
- Measurement of weight, BMI and waist where appropriate, together with blood pressure.
- Blood tests may assess glucose, lipids, liver function and thyroid function; additional endocrine tests are used only when indicated.
- Screening for weight-related complications such as sleep apnoea, diabetes and fatty liver may be recommended.
- Treatment may combine nutrition, activity, behavioural support and evidence-based medication when appropriate.
- Progress is judged by improvement in health, function and metabolic risk as well as weight change.
* IMPORTANT: A Note Before You Go
Weight is influenced by many factors and is not simply a matter of willpower. Effective obesity care is usually long-term, individualised and focused on improving health.
This page provides general educational information and cannot replace an individual medical assessment. If symptoms are persistent, worsening or concerning, arrange appropriate medical review.
NEED AN ASSESSMENT?
Arrange an Endocrinology Consultation
For non-emergency assessment or follow-up, appointments are booked through the hospital’s central appointment desk on 0422 432 4433. For severe or rapidly worsening symptoms, seek urgent medical care rather than waiting for a routine appointment.