Obesity is not just a matter of appearance or weight gain; it is a chronic disease that directly affects many systems in the body and needs to be treated. Obesity is generally defined as a Body Mass Index (BMI) of 30 or above. However, the number on the scale is not the only factor that determines health risks; where body fat is concentrated is also critically important.
In particular, excess fat collecting around the abdomen and waist, the “apple-shaped” body type, carries much higher health risks than fat accumulating around the hips and thighs (the “pear-shaped” body type).
Obesity can trigger the development of many chronic problems, from heart disease to diabetes and from sleep apnea to joint disorders. Of course, there is no fixed rule that every person with obesity will develop all of these conditions; factors such as genetic predisposition, age and lifestyle also play a role. Still, knowing the risk factors and taking early precautions is vitally important.
Key Health Problems Obesity Can Cause
Obesity can negatively affect the function of organs throughout the body, from head to toe. The most common obesity-related health problems are:
- Heart and Vascular Disease (Stroke)
- High Blood Pressure (Hypertension)
- Type 2 Diabetes
- Certain Types of Cancer
- Gallbladder Disease and Gallstones
- Osteoarthritis (Joint Wear and Tear)
- Gout
- Obstructive Sleep Apnea (Pauses in Breathing During Sleep)
- Depression and Psychological Problems
What Diseases Does Obesity Trigger?
1. Risk of Heart Disease and Stroke
Obesity is one of the biggest factors that directly threaten heart and vascular health. Excess body fat makes the heart work harder to pump blood throughout the body. Over time, this paves the way for high blood pressure and high cholesterol, significantly increasing the likelihood of blocked arteries, heart attack and stroke.
Did you know? Research shows that achieving weight control eases the burden on the cardiovascular system and that even small amounts of weight loss lead to substantial improvements in heart health.
2. Risk of Type 2 Diabetes
There is a direct and strong link between obesity and type 2 diabetes. Excess body fat causes cells to become resistant to the hormone insulin. This process, called insulin resistance, prevents sugar in the blood from entering cells and being converted into energy, causing blood sugar to rise to dangerous levels.
People with obesity have a many times higher risk of developing type 2 diabetes than people at an ideal weight. However, lifestyle changes and weight loss achieved under specialist supervision can both reduce the risk of diabetes and markedly improve blood sugar management in patients who have already been diagnosed.
3. The Link Between Obesity and Cancer
Excess weight and obesity can cause chronic, low-grade inflammation in the body, leading to cellular damage. This increases the risk of developing certain types of cancer. The main cancers with a proven link to obesity are:
- Colon (Large Intestine) Cancer
- Postmenopausal Breast Cancer
- Endometrial (Uterine Lining) Cancer
- Kidney Cancer
- Esophageal Cancer
In addition, medical research reports strong links between obesity and gallbladder, ovarian and pancreatic cancers. Unfortunately, as body mass index rises, the risk of developing these cancers and of cancer-related death may also increase.
4. Gallbladder Disease
Excess weight causes the liver to secrete more cholesterol into bile. This is one of the main causes of gallbladder disease and gallstone formation.
The most important point to note here is that rapid, uncontrolled weight loss can also increase the risk of gallstones. For this reason, the weight-loss process must be planned in a balanced way under the supervision of a dietitian and a physician.
The most important point to note here is that rapid, uncontrolled weight loss can also increase the risk of gallstones.
5. Osteoarthritis (Joint Wear and Tear)
Every extra pound the body carries increases the mechanical stress on the joints. With obesity, in particular the
- knee joints,
- hip area,
- lower back and spine
are the areas most damaged by this excess load. Extra weight causes the cartilage that keeps bones from rubbing against each other to wear down much faster. Weight management makes it possible to reduce pressure on the joints, relieve pain and regain mobility.
6. Gout
Gout is an inflammatory joint disease characterized by above-normal levels of uric acid in the blood, causing severe pain and swelling in the joints. In people with obesity, the excretion of uric acid by the kidneys may slow down, partly due to insulin resistance, and gout may occur more often. Weight control is one of the cornerstones of treatment for reducing the frequency and severity of gout attacks.
7. Obstructive Sleep Apnea (Pauses in Breathing During Sleep)
Sleep apnea is a serious condition in which the upper airway narrows or closes completely during sleep, causing the person to stop breathing for short periods. Fat tissue that builds up around the neck and airway in particular narrows the air passage and paves the way for sleep apnea.
The most common symptoms of sleep apnea are:
- Loud snoring
- Pauses in breathing during sleep (noticed by people close to you)
- Excessive daytime sleepiness and constantly waking up tired
- Distractibility and loss of concentration during the day
Untreated sleep apnea deprives tissues of oxygen and raises the risk of heart attack and stroke. A healthy weight-loss program can greatly relieve sleep apnea symptoms by reducing pressure on the airway.
Is the Risk of Obesity the Same for Everyone?
No. Although obesity generally poses a health risk to the whole body, the extent of that risk and which disease it may lead to varies from person to person. The factors that determine individual risk are:
- Family History and Genetic Predisposition: A family history of heart attack or diabetes at a young age increases the risk.
- Fat Distribution: Fat accumulating around the belly rather than the hips (visceral fat) multiplies metabolic risks.
- Lifestyle: A sedentary lifestyle and tobacco/alcohol use deepen the risks.
- Age and Existing Chronic Diseases.
For this reason, obesity treatment and risk assessment should be planned on an entirely individual basis.
Frequently Asked Questions About Obesity (FAQ)
What diseases does obesity cause?
Obesity can lead to the development of heart attack and stroke above all, as well as type 2 diabetes, high blood pressure, obstructive sleep apnea, osteoarthritis, gout and certain types of cancer such as colon, breast and uterine cancer.
Why is abdominal fat more dangerous?
Fat that builds up around the abdomen and internal organs (visceral fat) is metabolically much more active than fat in the hip area. This fat tissue secretes inflammatory substances called cytokines, directly increasing the risk of heart disease and insulin resistance.
Does losing weight reduce the health risks of obesity?
Yes. Losing just 5% to 10% of your current weight regulates blood pressure, balances blood sugar, lowers cholesterol and eases the load on your joints, significantly reducing the risks.
How does obesity cause sleep apnea?
Increased fat tissue around the neck and upper airway, combined with the relaxation of throat muscles during sleep, causes the airway to become blocked. This prevents air from reaching the lungs and leads to pauses in breathing during sleep (sleep apnea).
Take Action for Your Health
The information on our website is not intended to direct individuals to any treatment. Do not take any diagnostic or treatment steps without consulting your doctor. The content does not contain information about İzmir Can Hastanesi's therapeutic healthcare services.
