Featured Article: Chickenpox
Chickenpox is a highly contagious viral disease causing hundreds of itchy, fluid-filled blisters. Learn about chickenpox causes, symptoms, tests, treatment and prevention. See more »
a-c library
Diseases and Medical Conditions A - C provides down-to-earth, comprehensive definitions of hundreds of ailments and illnesses beginning with the letters A-C. Each listing identifies causes, incidence and risk factors, notes symptoms, outlines tests and discusses treatments and support groups where applicable.
Attention Deficit Hyperactivity Disorder (ADHD)
Attention deficit hyperactivity disorder (ADHD) is an extreme attention, over-activity or impulsivity problem. Learn about ADHD causes, symptoms, tests, treatment and prevention.
See more »Atypical Mycobacterial Infection
Atypical mycobacterial infections are infections caused by mycobacterium other than tuberculosis. Learn about atypical mycobacterial infection causes, symptoms, tests, treatment and prevention.
See more »Atypical Pneumonia
Atypical pneumonia refers to pneumonia caused by certain bacteria. Learn about atypical pneumonia types, causes, symptoms, tests, treatment and prevention.
See more »Aural Polyps
Aural polyps are growths in the external ear canal. Learn about aural polyp causes, symptoms, tests, treatment and prevention.
See more »Autism
Autism is a complex developmental disorder linked to abnormal brain biology and chemistry and genetics. Learn about autism causes, symptoms, tests, treatment and prevention.
See more »Autoerythrocyte Sensitivity
Autoerythrocyte sensitivity is sensitivity to one’s own red blood cells often from hemolytic anemia. Learn about autoerythrocyte sensitivity causes.
See more »Autoimmune Disorders
Autoimmune disorders are conditions caused by the body’s immune response against its own tissue. Learn about autoimmune disorder causes, symptoms, tests, treatment and prevention.
See more »Autoimmune Hepatitis
Autoimmune hepatitis is when immune cells mistake the liver for a foreign tissue or pathogen. Learn about autoimmune hepatitis causes, symptoms, tests, treatment and prevention.
See more »Autonomic Hyperreflexia
Autonomic hyperreflexia is an autonomic nervous system response to over-stimulation often after spinal injury. Learn about autonomic hyperreflexia causes, symptoms, tests, treatment and prevention.
See more »Autonomic Neuropathy
Autonomic neuropathy is a group of symptoms caused by damage to the autonomic nerves. Learn about autonomic neuropathy causes, symptoms, tests, treatment and prevention.
See more »Avian Influenza
Avian influenza is flu infection in birds. The virus can easily mutate to infect humans who have no immunity. Learn about avian influenza causes, symptoms, tests, treatment and prevention.
See more »Avoidant Personality Disorder
Avoidant personality is a psychiatric disorder defined by a lifelong pattern of extreme shyness and sensitivity to rejection. Learn about avoidant personality disorder causes, symptoms, tests, treatment and prevention.
See more »Axillary Nerve Dysfunction
Axillary nerve dysfunction is when damage to the axillary nerves causes a loss of movement or sensation in the shoulder. Learn about axillary nerve dysfunction causes, symptoms, tests, treatment and prevention.
See more »Backaches And Stress
Stress can make you more susceptible to getting a backache. Learn about backache and stress information and recommendations.
See more »Bacterial Gastroenteritis
Bacterial gastroenteritis is a bacterial infection of the stomach and intestines. Learn about bacterial gastroenteritis causes, symptoms, tests, treatment and prevention.
See more »Baker’s Cyst
Baker’s cyst is the accumulation of synovial fluid behind the knee due to trauma or arthritis. Learn about Baker’s cyst causes, symptoms, tests, treatment and prevention.
See more »Balanitis
Balanitis is an infection of the foreskin on uncircumcised men due to poor hygiene or improper rinsing. Learn about balanitis causes, symptoms, tests, treatment and prevention.
See more »Barbiturate Intoxication And Overdose
Barbiturate intoxication and overdose is the abuse of the type of depressant drug called barbiturates. Learn about barbiturate intoxication and overdose causes, symptoms, tests, treatment and prevention.
See more »Barrett’s Esophagus
Barrett’s esophagus is when the esophageal lining is damaged due to gastroesophageal reflux. Learn about Barrett’s esophagus causes, symptoms, tests, treatment and prevention.
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