The causes of obesity

Written by Luo Juan

Endocrinology

Updated on December 17, 2024

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Obesity can be classified into primary and secondary obesity according to its causes. Primary obesity, also known as simple obesity, is the most common type among various forms of obesity. It is mainly caused by poor dietary habits such as overeating, especially excessive intake of fatty foods, and a sedentary lifestyle, rather than being secondary to other diseases. Secondary obesity, on the other hand, is often due to diseases of the hypothalamic-pituitary axis, hypercortisolism, hypofunction of the thyroid or gonads, insulinomas, and other diseases. Secondary obesity is mainly due to diseases, and it can show some symptoms of the underlying disease.

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Written by Luo Juan

Endocrinology

1min 45sec

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symptoms of obesity

Regarding the symptoms of obesity, they vary with the type of disease. For example, in secondary cases, there are clinical manifestations of the primary disease. For instance, obesity caused by hypothyroidism may also present with fatigue, poor appetite, dry skin, etc. Some people have obesity due to insulinoma or recurrent hypoglycemia, leading to repeated eating. The clinical manifestations also include symptoms of hypoglycemia such as palpitations, trembling hands, sweating, and a sense of hunger. If it is a case of simple obesity, generally, men primarily show an apple-shaped obesity, with fat accumulated mainly above the waist. In contrast, women exhibit a pear-shaped obesity, with fat accumulation below the waist, such as in the lower abdomen, buttocks, and thighs. Of course, related to obesity, there are also manifestations of cardiovascular diseases, high blood pressure, diabetes, etc. Some people with obesity may also experience sleep apnea syndrome, venous thrombosis, and so on. Studies suggest that the incidence of malignant tumors is also higher in patients with obesity. Because patients with long-term obesity carry excess weight for a long period, they may experience lower back pain, joint pain, swelling, and are more prone to abrasion or combined fungal or purulent infections in the folds of the skin. Therefore, the clinical manifestations of obesity vary according to the cause of the disease.

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Written by Li Lang Bo

Endocrinology

1min 27sec

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Causes of Obesity

In the medical field, obesity is categorized into two types: primary (simple) obesity and secondary obesity. Primary obesity occurs without any other physical diseases and is solely due to irregular lifestyle, unscientific eating habits, and lack of exercise, leading to weight gain. This type can be managed with lifestyle adjustments and proper dietary guidance to reduce weight. Secondary obesity, which is less common, often involves endocrine disorders such as Cushing's syndrome. This condition can arise from issues with the pituitary or adrenal glands, or other parts of the body such as tumors, leading to excessive secretion of cortisol. This in turn causes redistribution of body fat, leading to characteristic signs like moon face, buffalo hump, and accumulation of subcutaneous fat which are manifestations of obesity. Additionally, conditions like hypothyroidism can lead to myxedema, contributing to obesity, as well as drug-induced obesity. Examples include patients with nephrotic syndrome or lupus who experience weight gain from prolonged use of corticosteroids. Therefore, the causes are diverse and require differential diagnosis by a specialist based on the individual's condition.

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Written by Tang Zhuo

Endocrinology

1min

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What is obesity?

Obesity is a common group of metabolic syndromes, which occurs when the caloric intake of a human body exceeds its caloric expenditure. The excess calories are then stored in the body in the form of fat. When this amount exceeds normal physiological needs and reaches a certain value, it evolves into obesity. There are many methods for assessing obesity, including anthropometry, dual-energy X-ray absorptiometry, ultrasound, CT, infrared sensing valves, and others. Obesity without a clear pathological cause is referred to as simple obesity, while obesity with a defined pathological cause is referred to as secondary obesity. The causes of obesity are of two types: one is primarily due to excessive diet and insufficient activity, where caloric intake exceeds caloric expenditure; the other is obesity caused by disorders of fat metabolism.

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Written by Tang Zhuo

Endocrinology

1min 14sec

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What causes obesity?

Obesity, also known as adiposis, is a chronic metabolic disease caused by excessive accumulation of fat in the body or abnormal distribution of fat. The causes of obesity are numerous and complex. The exact cause is not clear, but it is believed to include a variety of factors such as genetics and environment, which interact with each other. From the perspective of genetic factors, the probability of developing obesity significantly increases. The second factor, the environment, mainly includes diet and physical activity. Long periods of sitting or lack of sports, and insufficient physical activity can lead to reduced energy expenditure. Poor dietary habits, such as overeating, a preference for sweets or greasy foods, can easily lead to obesity. Thirdly, it can be due to some genetic abnormalities. Fourth, obesity in childhood is also more likely to progress to adult obesity, with more than 50% of individuals who are obese after the age of six developing obesity in adulthood.

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Written by Zhao Xin Lan

Endocrinology

1min 30sec

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Can people with obesity exercise?

Obesity is a metabolic disease caused by excessive accumulation of fat in the body or abnormal distribution, commonly referred to as obesity, with body weight exceeding the standard. Obesity can be due to excessive intake and insufficient exercise; thus, not only can obese individuals exercise, but they also need to persist in it. However, during exercise, it is important to consider special circumstances. The amount and method of exercise vary from person to person, and it is necessary to develop individualized exercise plans and choose exercises or programs that are easy to maintain while progressively advancing. However, when designing exercise treatment plans, it is crucial to consider the impact of complications, especially for patients with cardiovascular, respiratory, or musculoskeletal comorbidities, and choose suitable forms of exercise. Generally, it is recommended to exercise three to five days per week, with 30 to 45 minutes of appropriate activity each day. Patients with these complications should avoid intense exercises and can start with mild activities such as brisk walking, swimming, and strolling, or consult with rehabilitation specialists to develop appropriate individualized exercise plans.