Possible causes
- Insulin resistance – the body preferentially stores excess energy around the abdomen and in the liver.
- Chronic stress – persistently high cortisol promotes fat storage around the waist.
- Lack of sleep – worsens insulin sensitivity and increases cravings.
- Alcohol – often contributes to belly fat and fatty liver.
- Low muscle mass – less muscle means less capacity to process glucose.
- Hormones – falling testosterone in men and estrogen in perimenopause shift fat to the belly.
What to check
- Waist circumference – a simple but telling measurement; track it even if your weight is stable.
- Glucose, insulin, HbA1c – markers of insulin sensitivity.
- Triglycerides and HDL – high triglycerides and low HDL are often associated with visceral fat.
- CRP, cortisol and testosterone – depending on symptoms: inflammation, stress, hormonal status.
What helps
- Strength training – building muscle improves glucose handling more than cardio alone.
- Movement after meals – a short walk after each main meal.
- Less alcohol and sugary drinks – they directly affect the liver and belly fat.
- Nutrition – protein, vegetables, legumes, whole foods; fewer ultra-processed foods.
- Sleep and stress – 7–9 hours of sleep and daily moments of calm are part of the solution.
When to see a doctor
See a doctor if your belly is growing quickly, is hard or painful, purple stretch marks appear, you have high blood pressure, elevated blood sugar, or marked fatigue and muscle weakness.