Let's see if we can figure out what's causing your symptoms.
Select additional symptoms and we'll narrow your results.

What causes diarrhea, loss of appetite and nausea? 19 possible conditions

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



Giardiasis is a parasitic infection of the small intestine. It may cause fatigue, stomach pain, bloating, and excessive gas.

Read more »


The Many Sides of Bacterial Gastroenteritis

Bacterial infections are common causes of gastrointestinal infections. This type of infection is also called "food poisoning" and is often caused by poor hygiene or ingesting foods contaminated with bacteria.

Read more »


Viral Gastroenteritis

Viral gastroenteritis, also known as the stomach flu, is caused by a number of different viruses. Its symptoms usually last for two to three days.

Read more »


PMS (Premenstrual Syndrome)

PMS symptoms start five to 11 days before menstruation and typically go away once menstruation begins. The cause of PMS is unknown.

Read more »



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

Appendicitis is inflammation of the appendix, which can be fatal if left untreated. The telltale sign is pain that usually starts as mild cramping, especially on the right side, and becomes more severe over time.

Read more »


Celiac Disease (Gluten Intolerance)

Celiac disease is a digestive disorder caused by an immune reaction to gluten. Symptoms vary but can include arthritis, fatigue, and abdominal symptoms.

Read more »


Swine Flu

Swine flu, also known as H1N1, is a highly contagious virus with symptoms similar to common influenza types. It spreads quickly from person to person, and can linger on tables and surface areas.

Read more »


Irritable Bowel Syndrome

Irritable bowel syndrome (IBS) is a chronic condition that affects the large intestine and causes many uncomfortable symptoms, such as bloating, gas, cramping, diarrhea, constipation, and pain.

Read more »


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.

Read more »


Hookworm Infections

Hookworms are parasites that affect the small intestine and lungs. The first sign of infection is usually a rash where the parasite entered the skin, followed by diarrhea.

Read more »


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.

Read more »


Acetaminophen Overdose

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

Acetaminophen is a pain reliever found in over-the-counter medications such as Tylenol and in prescription medications. Overuse of this ingredient can lead to liver damage, and an overdose can be fatal.

Read more »



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

Anthrax is a serious illness caused by a microbe that lives in soil, called Bacillus anthracis. Inhalation may result in cold and flu symptoms; signs of ingestion include nausea and abdominal pain.

Read more »


Pancreatic Cancer

Pancreatic cancer is cancer of the pancreas, an organ that secretes an enzyme that breaks down fats, carbs, and proteins. Pancreatic cancer can obstruct the outflow of bile from the liver and causes yellow skin.

Read more »


West Nile Virus Infection (West Nile Fever)

Spread by mosquitos, West Nile virus symptoms can vary in severity. Diarrhea and abdominal pain usually appears within two weeks of infection.

Read more »



Leishmaniasis is a parasitic disease transmitted by a bite from an infected sandfly. It can affect the skin or internal organs. Symptoms of visceral leishmaniasis often appear months after exposure.

Read more »


Radiation Enteritis

Radiation is used in the treatment of cancer and comes with risks. Radiation enteritis is one of these risks. This condition is caused by the inflammation of your small intestine from radiation treatments in you...

Read more »


Staphylococcus Aureus Food Poisoning

According to the Centers for Disease Control and Prevention (CDC), Staphylococcus aureus is a common bacterium found in the nose and on the skin of about 25 percent of healthy people and animals. It is a common cause o...

Read more »


Snake Bites

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

A venomous snake bite can be deadly and is a medical emergency. Even a bite from a harmless snake can cause infection or an allergic reaction, producing symptoms like pain and swelling, convulsions, nausea, or paralysis.

Read more »

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