Is it normal to lose 20 pounds without trying?

Author: Zion Deckow  |  Last update: Tuesday, October 28, 2025

Unexplained Weight Loss If you lose more than 5% of your weight in 6 to 12 months, tell your doctor, especially if you're an older adult. That would be about 8 pounds if you weigh 150, or 10 pounds if you weigh 200. Sudden weight loss without a reason can be a sign of a health problem.

Why have I lost 20 pounds without trying?

Causes of unintentional weight loss

It can also be caused by malnutrition, a health condition or a combination of things. Some causes of unintentional weight loss include: mental health conditions, such as depression, anxiety, eating disorders and obsessive compulsive disorder (OCD)

How much weight loss is concerning without trying?

But many health care providers agree that a medical evaluation is called for if you lose more than 5% of your weight in 6 to 12 months, especially if you're an older adult. For example, a 5% weight loss in someone who is 160 pounds (72 kilograms) is 8 pounds (3.6 kilograms).

What type of infection can cause weight loss?

But, occasionally, the first symptom that is noticed with infections such as tuberculosis or HIV is weight loss. Hookworm infection of the gut is another example where weight loss may be the first indication of disease.

Which cancer causes weight loss?

Some types of cancer can also make it harder for your body to absorb nutrients (called malabsorption). Weight loss may be more common in lung cancer and upper gastrointestinal cancers such as pancreatic, stomach and esophageal cancer.

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What stage of cancer do you start losing weight?

Patients with advanced cancer often lose weight, but weight loss is often not thought to occur with early-stage disease. This study found that similar levels of weight loss occurred before diagnosis of both early and late-stage disease.

What are 20 warning signs of cancer?

Common cancer symptoms
  • Unexplained ache or pain. Pain can be a way our bodies tell us something is wrong. ...
  • Persistent headache or blurred vision. ...
  • Weakness in limbs and dizziness. ...
  • Abnormal sweating, especially at night. ...
  • Unexplained weight loss. ...
  • Unusual lump or swelling. ...
  • Breast changes. ...
  • Seizures.

What illnesses cause rapid weight loss?

  • Cancer.
  • Dementia.
  • Dental problems.
  • Depression (major depressive disorder)
  • Diabetes.
  • Hypercalcemia (high blood calcium level)
  • Hyperthyroidism (overactive thyroid) also known as overactive thyroid.
  • Hyponatremia (low blood sodium level)

When should you worry about weight loss?

As a rule of thumb, losing more than 5% of your weight over 6 to 12 months may indicate a problem. If you're an older adult with other medical conditions and health issues, even a smaller amount of weight loss may be significant.

What tests are done for unexplained weight loss?

What tests to run for unintentional weight loss? Common tests include blood tests (CBC, thyroid function, blood sugar), urine tests, imaging tests (like X-rays or CT scans), and sometimes endoscopy or colonoscopy, depending on symptoms and medical history.

Is 20 pounds noticeable weight loss?

Yes, 20 pounds (lbs) of weight loss is typically noticeable. However, this may vary depending on an individual's current weight, body composition, and distribution of weight.

What blood tests are done for weight loss?

This baseline blood test for weight loss measures the levels of several markers associated with metabolism, including a cholesterol and lipid panel, comprehensive metabolic panel (CMP), thyroid stimulating hormone (TSH) test, and a hemoglobin A1c (HbA1c) test.

Can dehydration cause weight loss?

1) The technique of weight loss through dehydration is not actually a weight loss technique. It is merely a way to enhance one's performance in a sport activity. If your aim is to lose weight and you are not a sports personality, you should never ever consider this option.

Why did I get so skinny all of a sudden?

While cancer and GI issues and mental health cause most unintentional weight loss, there are many other reasons you might suddenly lose weight, including: Dementia, due to changes in mealtime habits. Endocrine issues, including thyroid disorders and diabetes.

How to flush out water weight?

  1. Exercise Regularly. Daily exercise provides several health benefits, including preventing water retention. ...
  2. Drink More Water. Drinking water to reduce water weight sounds counterintuitive, but it helps. ...
  3. Manage Salt Intake. ...
  4. Cut Carbs. ...
  5. Focus on Certain Foods and Herbs. ...
  6. Try Supplements. ...
  7. Up Your Caffeine Intake.

How come I lost 20 pounds but still look the same?

When we begin to lose fat, it doesn't just decrease in one area — fat all over the body begins to slowly melt away, so initially, even though you're losing weight and fat, you may not see or feel much change.

Is weight loss a symptom of all cancers?

According to the American Cancer Society, significant weight loss happens most often with cancers that affect the stomach, pancreas, esophagus and lungs. Colorectal cancer, head and neck cancer and liver cancer can also cause weight loss.

What age is the hardest to lose weight?

People naturally lose muscle after 40, especially women after menopause. Because muscle burns more calories than fat, this can slow down your metabolism and make it harder to shake those stubborn pounds.

What weight loss is alarming?

When to Contact a Medical Professional. Contact your provider if: You or a family member loses more weight than is considered healthy for their age and height. You have lost more than 10 pounds (4.5 kilograms) or 5% of your normal body weight over 6 to 12 months or less, and you do not know the reason.

How much weight loss is concerning in a month?

"In general, 1 to 2 pounds per week, or 4 to 8 pounds per month, is a safe and sustainable amount to lose," says Sarah Gold Anzlovar, M.S., RDN, LDN and founder of Sarah Gold Nutrition. "Some people may lose more than that in the beginning, but it's often a lot of water weight and not true fat loss."

What disease makes you lose weight?

Eating disorders: Unexplained weight loss may be an early symptom of undiagnosed eating disorders like anorexia nervosa or bulimia nervosa. Heart failure: This can cause weight loss, especially in the later stages. Hyperthyroidism: This condition speeds up your metabolism and can lead to weight loss.

Why is my body shrinking day by day?

With muscle atrophy, your muscles look smaller than normal. Muscle atrophy can occur due to malnutrition, age, genetics, a lack of physical activity or certain medical conditions. Disuse (physiologic) atrophy occurs when you don't use your muscles enough. Neurogenic atrophy occurs due to nerve problems or diseases.

What are silent cancers?

Silent cancers do not have any initial symptoms. It is because most of these cancers affect the internal organs such as the stomach, intestines, liver, pancreas, lungs or bladder. They affect organs and other parts deep inside the body, so it is difficult to find them during a regular physical examination.

What is the biggest indicator of cancer?

Symptoms
  • Fatigue.
  • Lump or area of thickening that can be felt under the skin.
  • Weight changes, including unintended loss or gain.
  • Skin changes, such as yellowing, darkening or redness of the skin, sores that won't heal, or changes to existing moles.
  • Changes in bowel or bladder habits.
  • Persistent cough or trouble breathing.

What are the 5 warning signs of bowel cancer?

Symptoms of bowel cancer include:
  • change in bowel habit including diarrhoea, constipation or the feeling of incomplete emptying.
  • a change in the appearance or consistency of bowel movements such as thin bowel stools.
  • blood in the stools.
  • abdominal pain, bloating or cramping.
  • anal or rectal pain.
  • a lump in the anus or rectum.

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