13 Most Common Causes and Symptoms of Unexplained Weight Loss – 2024 Guide

The first thought of most people when they hear the words weight loss is – great, fat deposits melt! However, we need to know that there are two types of weight loss, and these are intentional and unintentional. In this article, we are going to focus on unintentional.

Before you start looking forward to losing weight without making the slightest effort, ask yourself what it is and listen to your body because sudden weight loss that is not caused by a change in lifestyle is rarely a good sign.

This, of course, does not mean that you need to raise the alarm if you lose a few pounds, but if it is 10% of your total weight in 3-6 months, it’s time to take care of your health because your body tells you something.

Sudden weight loss is often accompanied by symptoms such as headaches, fatigue, insomnia, and appetite disorders because it can indicate some of the following disorders or diseases.

1. Stress (burnout)

img source

Stress is a typical cause of unintentional weight loss and this is exactly the trigger for sudden weight loss in many people. In those moments, people do not care too much about their health because they are occupied with problems, they forget about the necessary intake of nutrients, which very quickly leaves a bad mark on your appearance, but also your body. What is important is that people understand that people who lose extra pounds this way will not look better, even though they may now have an ideal weight. On the contrary, he will look tired and sick, because the organism is exhausted.

2. Diabetes

img source: wp.com

We often hear that people with diabetes are usually obese, but few know that sudden weight loss is one of the first indicators of this disease. Today, this disease is very widespread and even children often get it. According to Trendlor, it is possible to keep it under control by regular intake of some foods such as cinnamon, ginger, aloe vera, and so on. By keeping it under control, you will stop unwanted weight loss.

3. Kidney disease

img source: vascularhealthclinics.org

The kidneys play a very important role in our body, indigestion, and metabolism. If their failure occurs, many health problems occur, and the first of the signs that occur is weight loss.

4. Increased thyroid activity

img source: verywellhealth.com

We already know that the thyroid gland controls metabolism and that its improper work is indicated by an equally sudden loss, but also by weight gain. In addition to weight loss, other symptoms such as fatigue, insomnia, irritability, and difficulty regulating body temperature occur.

5. Bowel disease

img source: agmg.com

Intestinal diseases are often first indicated by decreased appetite leading to weight loss, followed by nausea, bloating, and other symptoms. That is why it is important to consult a doctor in time because these may be diseases such as Crohn’s disease, celiac disease, colitis, and also chronic liver disease.

6. Adrenal insufficiency

img source: myamericannurse.com

Yes, and this also happens in moments when the body is not able to produce a sufficient amount of cortisol, that is, it does not react well to stress. The first of the symptoms that occur are weight loss, dizziness, and various infections.

7. Depression

img source: cloudfront.net

Depression is one of the most common causes of unwanted weight loss. In situations they do not know how to deal with, people often forget about basic living needs or feel that there is no point in eating. Those more serious cases are even so depressed that they feel they don’t deserve to eat.

8. Rheumatoid arthritis

img source: wp.com

Although this is a disease that usually occurs between 30 and 50 years of age, it is not excluded that it occurs earlier, even in children. Although at first, it is difficult to link weight loss with this disease that affects joint health, the connection is very present – anti-inflammatory cyclones stimulate inflammation and thus increase the consumption and burning of calories and fat.

9. Eating Disorders

img source: myhealthathand.com

In this case, we cannot say that it is a loss of appetite, but a fight against hunger caused by an unfounded fear of gaining weight. The causes are usually emotional and a person very quickly loses a realistic picture of himself, even when he suddenly loses 15-60% of his total weight.

10. Parasites

img source: wexnermedical.osu.edu

Various parasites lead to unwanted weight loss. These are usually those that are taken into the body through food, drink, and unclean hands. That is why there is a saying that hygiene is half of health.

11. Cancer

img source: addictioncenter.com

Scientific research has shown that unexplained weight loss of more than 10 kilograms indicates cancer of the pancreas, stomach, esophagus, or lungs. Very often, weight loss is the first indicator of this disease.

12. Low-calorie intake

img source: healthline.com

Many resort to low-calorie diets with the desire to get rid of excess weight as soon as possible. Although they are effective in this regard, these diets are also very dangerous to human health, because too low a calorie intake prevents the body from performing basic biological functions. These diets are usually recommended for people whose body mass index is greater than 30, and even then, must be performed under a doctor’s supervision.

13. Digestive disorders

img source: readersdigest.ca

Indigestion is one of the most common causes of sudden weight loss. What happens at that point is that the body does not break down food properly and thus does not provide the cells with nutrients. In addition to weight loss, there is also chronic fatigue, vomiting, diarrhea, nausea.


When you have health – you have everything. That is why you need to take care of your body in every possible way. Try to get rid of bad habits such as cigarettes and alcohol, treat yourself to regular sleep, engage in some physical activity, and most importantly, take care of what you eat. Then when you achieve harmony with yourself and start listening to your body, you will lose weight, but in the right way, so that you stay healthy and satisfied.