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What causes irritable mood? 83 possible conditions

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


Nutritional Deficiencies (Malnutrition)

A nutritional deficiency occurs when the body doesn't absorb the necessary amount of a nutrient. Deficiencies can lead to a variety of health problems.

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Neuroblastoma is a rare cancer that affects the sympathetic nervous system, usually in young children. Learn about the symptoms and treatment options.

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Infectious (Septic) Arthritis

Infectious arthritis occurs when an infection, caused by a bacteria or virus, spreads to a joint or the fluid surrounding the joint (synovial fluid).

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Herpes Stomatitis

Recurrent herpes simplex labialis, also known as oral or orolabial herpes, is an infection of the mouth area caused by the herpes simplex virus. It is a common and contagious infection that spreads easily.

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Huntington's Disease

Huntington's disease is a hereditary condition in which your brain's nerve cells gradually break down. It can cause physical and psychological symptoms.

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Pinworm Infection

A pinworm infection is a highly contagious type of human intestinal worm infection.

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Celiac Disease (Gluten Intolerance)

Celiac disease is a digestive disorder caused by an abnormal immune reaction to gluten. Learn about celiac disease systems, diagnosis, and treatment.

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Hirschsprung Disease

Hirschsprung disease is a blockage that occurs in the colon in about one of every 5,000 births. The cause is unknown, but tends to affect more boys and those with Down syndrome or another inherited condition.

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Poliomyelitis, or polio, is a highly contagious disease that is caused by a virus that attacks the body's nervous system.

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Pituitary Cancer

The pituitary gland is a very small gland of major importance to the functioning of the human body. It is located directly behind the eyes and below the front of the brain. It is about the size of a pea. Despite it...

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Tetanus, also called Lockjaw, is a serious bacterial infection that affects the nervous system and causes muscles throughout the body to tighten.

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Tay-Sachs Disease

Tay-Sachs disease is a neurodegenerative disorder most commonly found in infants. Learn more about this rare disease.

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Adrenergic Bronchodilators Overdose

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

An adrenergic bronchodilators overdose is when you take too much of a certain kind of asthma medication.

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Skull Fractures

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

A skull fracture is any break in the cranial bone, or the skull. It can result in bleeding, bruising, pain, and swelling. Less severe symptoms include headache, nausea, confusion, and blurred vision.

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Aortic Coarctation

Coarctation of the aorta is a congenital malformation of the aorta in which part of the aorta is constricted or narrowed.

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Personality Disorder

Find information on personality disorder types, symptoms, diagnosis, and treatment.

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Metachromatic Leukodystrophy

Metachromatic leukodystrophy occurs when an enzyme known as arylsulfatase A isn't present in the body. Learn about the types, symptoms, and diagnosis.

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Hemolytic Uremic Syndrome

Hemolytic uremic syndrome (HUS) occurs when an immune reaction causes low red blood cell levels, low platelet levels, and kidney injury.

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Krabbe Disease

Krabbe disease is a rare and usually deadly disorder of the nervous system. It is an inherited genetic disease, which means that it is passed down in families.

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Broken Hip

A broken hip is a serious condition at any age. It almost always requires surgery. Complications associated with a broken hip can be life-threatening.

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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.