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Learn about your rapid weight loss, including causes and common questions. Or get a personalized analysis of your rapid weight loss from our A.I. Symptom Checker. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

Your Rapid Weight Loss May Also be Known as:
Lost weight fast
Quickly lost weight

Top 9 Rapid Weight Loss Causes

  1. 1.Overactive Thyroid

    The thyroid is a butterfly-shaped gland in the neck, just above your collarbone. It is one of your endocrine glands, which make hormones. Thyroid glands control how fast one burns calories and how fast the heart beats. If the thyroid is too active, it makes more thyroid hormones than the body needs. This is called hyperthyroidism.

    You should visit your primary care physician, who might take a blood test to measure your levels of thyroid hormone. The test will tell the doctor whether a referral to an endocrinologist is useful. Treatment plans would likely be set by the specialist and include drugs to reduce your thyroid activation.

    Rarity:
    Uncommon
    Top Symptoms:
    fatigue, anxiety, depressed mood, irritability, trouble sleeping
    Urgency:
    Primary care doctor
  2. 2.Celiac Disease

    Celiac disease is an immune disease in which gluten damages the small intestine. Avoid products containing gluten such as wheat, rye, & barley.

    Celiac disease is best managed by following a strict gluten-free diet. Consult with a doctor or dietician for support.

    Rarity:
    Rare
    Top Symptoms:
    fatigue, nausea, stomach bloating, constipation, diarrhea
    Urgency:
    Primary care doctor
  3. 3.Peptic Ulcer Disease

    A peptic ulcer is a sore in the lining of the stomach or the first part of your small intestine (the duodenum), which causes pain following meals or on an empty stomach.

    You should go see your doctor in the next few days for a sick visit. He/she will assess the need for certain tests (such as for a bacteria in the stomach and/or a procedure to take a picture of your stomach wall). He/she will definitely suggest taking an anti-acid medication, such as omeprazole, which you can take over-the-counter to help your pain.

    Rarity:
    Uncommon
    Top Symptoms:
    fatigue, abdominal pain (stomach ache), nausea, loss of appetite, moderate abdominal pain
    Urgency:
    Primary care doctor
  4. 4.Chronic Obstructive Pulmonary Disease (Copd)

    COPD (chronic obstructive pulmonary disease) is a chronic condition of the lungs and the airways in the lungs. Damage has occured due to long-term exposure to substances that irritate and damage the lungs, such as cigarette smoke or air pollution. This damage can cause symptoms like shortness of breath, decreased exercise tolerance and cough. A common cold or other types of infection can cause symptoms to worden acutely, this is called an exacerbation.

    Though there is no medication for COPD that has demonstrated the ability to reverse the decreasing long-term lung function associated with the disease, your doctor will be able to provide you with next steps for managing the disease. Some possible next steps include cessation of smoking, pulmonary rehabilitation and inhalation medication.

    Rarity:
    Common
    Top Symptoms:
    fatigue, cough, shortness of breath, trouble sleeping, anxiety
    Symptoms that always occur with chronic obstructive pulmonary disease (copd):
    hidden: any cardinal symptom copd
    Symptoms that never occur with chronic obstructive pulmonary disease (copd):
    rectal bleeding
    Urgency:
    Primary care doctor

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  5. 5.Stomach Neoplasm

    Stomach neoplasm is a disease affecting that stomach that impairs it's ability to function properly.

    You schedule a visit with your primary care physician (PCP). It is likely imaging will be performed as well as blood tests to inform next steps.

    Rarity:
    Rare
    Top Symptoms:
    abdominal pain (stomach ache), nausea, loss of appetite, constipation, diarrhea
    Urgency:
    Primary care doctor
  6. 6.Sarcoidosis

    Sarcoidosis is an inflammatory disease that most often affects the lungs and skin, but can als affect the joints.

    You should visit your physician to discuss your symptoms when convenient.

    Rarity:
    Rare
    Top Symptoms:
    fatigue, headache, shortness of breath, loss of appetite, joint pain
    Urgency:
    Primary care doctor
  7. 7.Graves' Disease

    The thyroid gland is a butterfly-shaped organ inside the neck that is responsible for making thyroid hormones. These hormones control important body functions, such as heart rate and the rate at which the body turns food into energy. In Grave's disease, the immune system malfunctions and drives the thyroid to produce excessive amounts of hormones, leading to symptoms such as trouble sleeping, irritability and nervousness, heat sensitivity, hand tremors, and weight loss.

    You should visit your primary care physician to get your blood tested. Grave's disease is a complex condition that is managed with prescription antithyroid medications, as well as surgery in rare cases.

    Rarity:
    Rare
    Top Symptoms:
    fatigue, irritability, anxiety, difficulty concentrating, trouble sleeping
    Urgency:
    Primary care doctor
  8. 8.Hashimoto's Disease

    The thyroid gland is a butterfly-shaped organ inside the neck that is responsible for making thyroid hormones. These hormones control important body functions, such as heart rate and the rate at which the body turns food into energy. Hashimoto's disease is a condition in which the immune system attacks the thyroid, and not enough thyroid hormone is produced, leading to symptoms like fatigue and weight gain.

    You should visit your primary care physician. Hashimoto's disease is a complex condition that is usually treated by hormone replacement therapy to bring hormone levels back up to normal.

    Rarity:
    Common
    Top Symptoms:
    fatigue, difficulty concentrating, weight gain, constipation, diarrhea
    Urgency:
    Primary care doctor
  9. 9.Intestinal Infection by Giardia Parasite

    Some intestinal illnesses are caused by parasitic infection. People can become infected if they swallow or swim in contaminated water or are exposed to infected feces.

    You should visit your primary care physician to evaluate your symptoms. It is likely that your physician will want to run tests on a stool sample.

    Rarity:
    Rare
    Top Symptoms:
    fatigue, nausea, stomach bloating, loss of appetite, diarrhea
    Symptoms that never occur with intestinal infection by giardia parasite:
    anxiety
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Rapid Weight Loss

  • Q.How long have you been losing weight?
  • Q.Do you currently smoke?
  • Q.Any fever today or during the last week?
  • Q.Have you lost your appetite recently?

If you've answered yes to one or more of these questions, check our rapid weight loss symptom checker.

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Rapid Weight Loss Symptom Checker Statistics

  • People who have experienced rapid weight loss have also experienced:

    • 6% Fatigue
    • 5% Loss of Appetite
    • 3% Nausea
  • People who have experienced rapid weight loss had symptoms persist for:

    • 69% Over a Month
    • 11% Two Weeks to a Month
    • 9% One to Two Weeks
  • People who have experienced rapid weight loss were most often matched with:

    • 9% Overactive Thyroid
    • 8% Peptic Ulcer Disease
    • 7% Celiac Disease

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Check my rapid weight loss symptoms

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