Obesity
Sources consulted
This article is original patient-education content.
- WHO—Health topics A–Z(2024)
- NHS—Health A to Z(2024)
- CDC—Health topics(2024)
Based on international clinical guidelines
Overview
Obesity is a medical condition where a person has an unhealthy amount of body fat. It is more than just being overweight — it can increase the risk for other health problems, such as heart disease, diabetes, and joint issues.
Key facts
- Obesity is measured using body mass index (BMI) and waist size, but these are only screening tools.
- It is caused by a combination of genetic, environmental, and lifestyle factors.
- With proper support and treatment, many people can improve their health and reduce risks.
Yes, obesity is very common worldwide. In the UK, about 1 in 4 adults is living with obesity, and rates have been rising over the past few decades.
Obesity can affect people of all ages, genders, and backgrounds. It is more common in some ethnic groups and in people with lower income or education levels, but it can happen to anyone.
Symptoms
- Sudden severe chest pain or pressure
- Trouble breathing that comes on quickly and does not go away
- Signs of a stroke: drooping face, arm weakness, or slurred speech
- ⚠New or worsening shortness of breath that affects daily activities
- ⚠Chest pain that is not severe but persists
- ⚠Signs of a blood clot in the leg: swelling, redness, or pain in one calf
Common symptoms
- Carrying excess weight, especially around the waist
- Feeling short of breath or breathless with mild activity
- Increased sweating or feeling hot all the time
- Joint or back pain
- Low energy levels or feeling very tired
Symptoms in children
- Eating large portions or feeling hungry often
- Avoiding physical activity or getting tired quickly
- Being bullied or teased about weight
- Breathing problems during sleep, like snoring or pauses in breathing
Symptoms in older adults
- Difficulty moving around or walking
- Worsening of joint pain, especially in knees and hips
- High blood pressure or high blood sugar
- Feeling breathless with simple tasks like dressing
Causes
Main causes
- Eating more calories than the body burns off over time
- Not getting enough physical activity
- Genetic factors that affect how the body stores fat and uses energy
- Certain medical conditions (like underactive thyroid) or medications
Risk factors
- Having a family history of obesity
- Being sedentary (sitting for long periods each day)
- Eating a diet high in processed foods, sugar, and unhealthy fats
- Not getting enough good-quality sleep
- High stress levels
When to see a doctor
See a doctor urgently if:
- If you have chest pain or trouble breathing that is new or worsening
Book a routine appointment if:
- If you are worried about your weight and want to talk about healthy changes
- If you have other health conditions like high blood pressure, diabetes, or joint pain
- If you have tried to lose weight on your own without lasting success
Diagnosis
A doctor will usually start by measuring your height and weight to calculate your body mass index (BMI). They may also measure your waist to check for abdominal fat. Your BMI gives a rough idea, but it is not a perfect measure — your doctor will consider your overall health.
Tests that may be done
- Body mass index (BMI) measurement
- Waist circumference measurement
- Blood tests to check for conditions like diabetes, high cholesterol, or thyroid problems
What to expect at your appointment
The doctor will ask about your eating habits, physical activity, medical history, and any symptoms. They may also discuss your family history and check your blood pressure. This is to get a full picture of your health and any related risks.
Treatment
Treatment for obesity is not just about losing weight quickly. It focuses on long-term health improvements through changes in eating, activity, and sometimes medical help. Your doctor will work with you to create a plan that fits your life and goals.
Self-care at home
- Start small: add a 10-minute walk to your day
- Replace sugary drinks with water or unsweetened tea
- Eat more vegetables, fruits, and whole grains
- Keep a food diary to notice patterns
- Aim for 7–9 hours of sleep each night
Medical treatments
If lifestyle changes are not enough, your doctor may recommend structured weight management programmes, which include diet advice, exercise plans, and behaviour support. In some cases, prescription medication may be offered to help manage appetite or absorption — but only as part of a complete plan. These treatments are always prescribed and monitored by a healthcare professional.
When is surgery considered?
Weight loss surgery (bariatric surgery) may be considered for people with severe obesity who have not had success with other treatments and have serious health problems. It is not a quick fix, but it can lead to significant weight loss and improve health. A specialist team will assess if it is right for you.
Living with this condition
Living with obesity can affect many parts of life, from how you feel about yourself to how you move and sleep. It helps to focus on small, consistent changes rather than trying to do everything at once. Be kind to yourself and celebrate progress.
Lifestyle tips
- Eat regular meals and avoid skipping breakfast
- Include physical activity you enjoy, like dancing, swimming, or gardening
- Find healthy ways to manage stress, such as deep breathing or talking to a friend
- Limit screen time and take breaks from sitting every hour
Diet and exercise
Aim for at least 150 minutes of moderate activity each week, such as brisk walking. Include strength exercises twice a week. For diet, try to fill half your plate with vegetables, choose whole grains over refined ones, and eat lean protein. Avoid fad diets — they rarely work long term.
Mental health and emotional wellbeing
Obesity can lead to low self-esteem, depression, and anxiety. It is common to feel judged or embarrassed. Talking to a therapist or counsellor can help. Remember: your weight does not define your worth.
Prevention
Obesity can often be prevented by maintaining a balanced diet, staying active, getting enough sleep, and managing stress. Starting these habits early in life can help, but it is never too late to make healthier choices.
Screening programmes
Your doctor may check your weight and waist size during routine appointments. This can help catch weight gain early and allow for quick action.
Complications
If left untreated
- Type 2 diabetes
- High blood pressure and heart disease
- Stroke
- Sleep apnea (breathing stops during sleep)
- Joint problems like osteoarthritis
- Certain cancers (such as breast and bowel cancer)
Long-term outlook
The outlook for people with obesity is positive when they get the right support. Even modest weight loss of 5–10% can lower blood pressure, improve blood sugar, and reduce joint pain. With ongoing care, many people see real improvements in their health and quality of life.
Find support
International organisations
Local organisations
Helplines
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.