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What causes loss of appetite? 161 possible conditions

See a list of possible causes in order from the most common to the least.


E. coli Infection

E. coli is a type of bacteria normally found in intestines. But certain kinds of E. coli can cause infection and severe symptoms like diarrhea and dehydration.

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Bipolar Disorder

Bipolar disorder mental illness marked by extreme from mania to depression. Bipolar disorder is also called bipolar disease or manic depression.

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Pneumonia is an infection of the lungs caused by fungi, bacteria, or viruses. General symptoms include chest pain, fever, cough, and difficulty breathing.

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Infectious Mononucleosis

Infectious mononucleosis, or "mono," is a group of symptoms caused by the Epstein-Barr virus. One potential symptom is a pink rash that looks like the measles.

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The Atypical Facts About Atypical Pneumonia

Pneumonia is an infection that causes inflammation of the lungs. Atypical pneumonia is a kind that isn't caused by the bacteria that causes typical pneumonia.

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Congestive Heart Failure (CHF)

Congestive heart failure (CHF) is a chronic condition that affects the chambers of your heart. CHF refers to fluid buildup around your heart.

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Cellulitis is a common, often painful skin infection that first appears as a red, swollen area that feels hot and tender to the touch. If left untreated, it can become life-threatening.

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Underactive Pituitary Gland (Hypopituitarism)

The pituitary gland releases hormones that play roles in body processes like bone growth and metabolism. An underactive pituitary can disrupt these processes. Causes may include tumors, traumatic injuries, and diseases.

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Acute HIV Infection

Acute HIV infection is the primary stage of infection by the human immunodeficiency virus. There are several telltale symptoms, one of which is a rash.

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Crohn’s Disease

Crohn's disease is a chronic bowel disease that causes severe inflammation of the digestive tract. It is associated with abdominal pain, diarrhea, and may affect your quality of life. Crohn's disease is characterized b...

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Ulcerative Colitis

Ulcerative colitis is an inflammatory bowel disease. It occurs when the lining of the large intestine (colon or bowel) and the rectum become inflamed.

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Addison’s Disease

Addison's disease occurs when the adrenal cortex is damaged and the adrenal glands don't produce enough of the steroid hormones cortisol and aldosterone.

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Subdural Hematoma

This condition is considered a medical emergency. Urgent care may be required.

A subdural hematoma occurs when blood collects on your brain's surface beneath the skull. They usually result from a head injury.

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Gallstones are hard deposits in the gallbladder that can eventually block the exiting bile ducts. Abdominal pain, fever, itchy skin, and jaundice are symptoms.

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Urethritis is an infection of the urethra, the tube that carries urine from the bladder and semen out of the body. Symptoms include burning while urinating, abdominal pain, and discharge.

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Menieres Disease

Meniere's disease is a disorder of the inner ear. It's not known what causes it, but there are a variety of treatments available to help with the symptoms.

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Rheumatoid Arthritis Overview

Rheumatoid arthritis (RA) is an autoimmune disease, a disease in which the immune system mistakes the body's own cells for invaders. In RA, the immune system attacks the synovia, the membranes lining the joints.

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Peripheral Neuropathy

Peripheral neuropathy occurs when nerves malfunction because they're damaged or destroyed. You'll notice a tingling, numbness, or weakness, and possibly sweating, constipation, or diarrhea.

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Drug Allergy Overview

This condition is considered a medical emergency. Urgent care may be required.

A drug allergy is an allergic reaction to a medication. Your immune system identifies the drug as foreign and acts to eliminate it from your body.

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Pelvic Inflammatory Disease (PID)

Pelvic inflammatory disease (PID) is an infection of the reproductive organs in women. It's marked by pain in the abdomen, especially during urination or sex.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.