What is sudden weight loss and what is its cause?

The issue that obese and overweight people are involved in is the issue of weight loss, which is not an easy task and requires a lot of effort. When we think of losing weight, we must also consider that this weight loss is fundamental and the process is very natural and without What do you know about sudden weight loss? What is the cause?

According to “Reader’s Digest”, hospitalization can lead to malnutrition because in conditions where patients benefit from medical care, they may not receive the right amount of nutrients for a healthy life. If malnutrition continues for a long time, this condition can have a significant impact on a person’s health and lead to weight loss for no reason.

In situations where the elderly are at greater risk due to medication or age-related loss of appetite, an unbalanced diet can lead to malnutrition in young and possibly healthy people. The best way to treat malnutrition is to prevent it before it becomes serious. Accordingly, it is necessary to ensure the consumption of balanced meals containing sufficient amounts of protein, fat, and carbohydrates. If you are hospitalized, pay special attention to nutrients and talk to your doctor about this to ensure proper nutrition during your stay and after you leave the hospital.

In the following, we will learn more about some reasons why unexplained weight loss can be a sign of a serious problem.

muscle wasting (muscle wasting)

Researches have shown that neglecting muscle health is one of the main causes of muscle mass deterioration with age. The technical term used for this condition is “sarcopenia” or muscle wasting, which can begin as early as the fourth decade of a person’s life and lead to unexplained weight loss and decreased strength, energy, and mobility.

While hormonal changes can affect the process of building and storing muscle with age, most cases of muscle weakness are linked to poor nutrition and inactivity. One of the best options for preventing muscle wasting and associated weight loss is adding more protein and vitamin D to your diet. Older people need more protein to build muscle because the body becomes less efficient at processing protein with age. It is also a good idea to add weight training to your exercise program.


In general, cancer can cause weight loss, but there are different types of cancer, such as lung, pancreatic, biliary tract, and colon, that are better known for unexplained weight loss. The abnormal function of cancer cells can get out of control, speed up the metabolism, and exhaust the entire body by using the available resources, which leads to weight loss.

Cancer treatment can also lead to weight loss. Radiation therapy and chemotherapy often lead to loss of appetite and can cause side effects such as nausea, vomiting, and mouth pains that reduce the patient’s desire to eat.


Unexplained weight loss can be a sign of a thyroid problem. Hyperthyroidism, also known as Graves’ disease, is an autoimmune disease that causes the thyroid gland to release excessive amounts of thyroid hormone. This condition speeds up the metabolism and causes the body to burn more calories than it can consume.

Some of the causes of hyperthyroidism include Hashimoto’s thyroiditis, use of certain drugs such as lithium, neck radiation therapy, thyroid surgery, pregnancy, and iodine deficiency. It is possible to check thyroid health through a blood test.


Acquired immunodeficiency syndrome, also known as AIDS, is a chronic and potentially life-threatening disease caused by the human immunodeficiency virus (HIV). HIV can make it difficult for the body to absorb nutrients, which leads to malnutrition and can reduce appetite. While there is still no cure for HIV or AIDS, some drugs can significantly slow the progression of the disease and allow the infected person to lead a normal life.

Peptic ulcer disease

Digestive or peptic ulcers occur in the inner lining of the stomach as well as the upper part of the small intestine. These wounds cause pain and increase acid production, which leads to reflux. Since the main symptom of peptic ulcers is pain in the stomach area, they often lead to loss of appetite. Lifestyle modifications along with medication are the best way to treat this disease and associated weight loss.


Depression is a mood disorder that results in a persistent feeling of sadness and a loss of interest in most things—even options that the person once enjoyed. In a situation where weight gain can be one of the symptoms of depression, weight loss is also one of its symptoms. One of the side effects of depression is low appetite, which naturally leads to weight loss. By visiting a doctor, you can find the best treatment method to deal with depression and lose weight related to it.

congestive heart failure

This fatal disease occurs when the heart is unable to pump enough blood and oxygen. An important indicator of this disease or worsening heart condition is rapid and unexplained weight loss (loss of at least 7.5% of normal body weight over six months), known as cardiac cachexia.

Since the gut, like other organs of the body, needs adequate blood flow, researchers believe that decreased blood flow can cause symptoms of digestive problems and weight loss associated with heart failure. If you or someone else experiences rapid weight loss along with shortness of breath, chronic cough, fatigue, and nausea, see your doctor immediately to check for congestive heart failure.


We often associate diabetes with weight gain and obesity, but weight loss can be one of the surprising signs of diabetes. When the body is no longer able to produce enough insulin, glucose does not form in the bloodstream to be used as energy. When there is insulin deficiency, the body begins to burn fat and muscle for energy, which leads to weight loss.

Alcohol addiction

Alcohol can lead to the formation of bloating, and alcoholism can lead to significant weight loss. These conditions are formed due to the increased feeling of fullness and early satiety. In addition, alcohol addiction can lead to the formation of peptic ulcer disease, which also causes weight loss.

Source: Vakil Mellat

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