Overweight and obesity are defined as abnormal or excessive fat accumulation that presents a risk to health. A body mass index (BMI) over 25 is considered overweight and over 30 is obese. 

The most common method to check if you are a healthy weight is body mass index (BMI) 
This is a measure of whether you are a health weight for your height. You can use the NHS BMI healthy weight calculator. 

https://www.nhs.uk/live-well/healthy-weight/bmi-calculator/ to find out your BMI. 

Cause of Obesity
  • Obesity and Overweight is caused when extra calories, especially those from foods high in fat and sugar are stored in the body as fat. 
  • Obesity is an increasingly common problem due to environment we live in which makes it difficult for many people to eat healthily and do enough exercise. 
  • Genetics can also be the cause of obesity. Your genes can affect how your body uses food and stores fat. 
  • Some health conditions can occasionally contribute to weight gain such as underactive thyroid gain. (These can be effectively controlled with medication)
  • Some medications can also make people more likely to put on weight including some medications for high blood pressure, diabetes, or mental health issues. 
Symptoms of Obesity
  • Difficulty in sleeping, sleep apnoea and daytime drowsiness
  • Back and/or join pains. 
  • Excessive sweating. 
  • Intolerance to heat. 
  • Infections to skin folds. 
  • Fatigue
  • Depression.
  • Shortness of breath (dyspnoea)
Treating Obesity
  • Eat a healthy reduced calorie diet. 
  • Exercise regularly
  • Join a weight management programme. 
  • Take part in activities such as walking, jogging and swimming for 2.5 to 5 hours a week. 
  • For people with certain health conditions, a specialist may advise weight loss surgery.
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Page last reviewed: 31 October 2024
Next review due: 31 October 2025