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The exact causes of anxiety disorders are unknown. However, certain risk factors associated with these conditions include personality, family history, being female, stress and brain illness. People with anxiety disorders... More »

www.reference.com Health Conditions & Diseases

According to WebMD, anxiety is caused by the use of drugs, psychological conditions, physical conditions or by more than one of these factors at the same time. Anxiety comes in many different forms; some common anxiety d... More »

www.reference.com Health Conditions & Diseases Mental Health

Certain experiences, medical conditions or medications may cause anxiety, the symptoms of which include feeling nervous or powerless, an increased heart rate, rapid breathing and sweating, states Mayo Clinic. Anxiety oft... More »

www.reference.com Health Conditions & Diseases Mental Health
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Possible medical causes of yawning include narcolepsy, sleep apnea and medications that treat anxiety or depression, according to Healthline. However, the more common causes are boredom and fatigue. Yawning may occur on ... More »

www.reference.com Health Conditions & Diseases

Causes of hepatomegaly include gastrointestinal disorders such as sclerosing cholangitis, which is a condition in which the bile ducts become damaged due to swelling; glycogen storage disease, a disorder that runs in the... More »

www.reference.com Health Conditions & Diseases

Causes of chronic lightheadedness include migraines, anxiety, low blood sugar, dehydration and anemia, according to Mayo Clinic. Patients with medical conditions such as low blood pressure, labyrinthitis and benign parox... More »

www.reference.com Health Conditions & Diseases

While many case studies implicate genes in the cause of attention deficit hyperactivity disorder, scientists have not conclusively found the source, explains the National Institute of Mental Health. There is also researc... More »

www.reference.com Health Conditions & Diseases