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Common Symptoms:
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Diseases and Medical Conditions M-O provides down-to-earth, comprehensive definitions of hundreds of ailments and illnesses beginning with the letters M-O. Each listing identifies causes, incidence and risk factors, notes symptoms, outlines tests and discusses treatments and support groups where applicable.
Featured Article: Malignant Hyperthermia
Malignant hyperthermia is a disease that causes rapid fever and muscle contractions from anesthetic exposure. Learn about malignant hyperthermia causes, symptoms, treatment and prevention. See more »
Migraine With Aura
Migraine with aura is a migraine headache preceded by a visual disturbance. Learn about migraine with aura causes, symptoms, treatment and prevention.
See more »Migraine Without Aura
Migraine without aura is a migraine headache with no preceding symptoms. Learn about migraine without aura causes, symptoms, treatment and prevention.
See more »Milia
Milia are small white bumps caused by trapped dead skin common in infants around mouth or chin. Learn about milia causes, symptoms, tests, treatment and prevention.
See more »Milk-alkali Syndrome
Milk-alkali syndrome is when high levels of calcium cause metabolic alkalosis. Learn about milk-alkali syndrome causes, symptoms, treatment and prevention.
See more »Mineral Metabolism Disorders
Mineral Metabolism Disorders information from HowStuffWorks. Learn about causes, symptoms and treatments of Mineral Metabolism Disorders.
See more »Minimal Change Disease
Minimal change disease is a kidney disease in which glomeruli undergo microscopic changes. Learn about minimal change disease causes, symptoms, treatment and prevention.
See more »Miscarriage
Miscarriage is the loss of a fetus during the first 20 weeks of pregnancy due to natural causes. Learn about miscarriage causes, symptoms, tests, treatment and prevention.
See more »Mitral Regurgitation - Acute
Mitral regurgitation – acute is when the heart’s mitral valve suddenly closes improperly. Learn about acute mitral regurgitation causes, symptoms, treatment and prevention.
See more »Mitral Regurgitation - Chronic
Mitral regurgitation – chronic is a progressive disorder in which the heart’s mitral valve closes improperly. Learn about chronic mitral regurgitation causes, symptoms, treatment and prevention.
See more »Mitral Stenosis
Mitral stenosis is a narrowing or blockage of the heart’s mitral valve. Learn about mitral stenosis causes, symptoms, treatment and prevention.
See more »Mitral Valve Prolapse
Mitral valve prolapse is when the heart’s mitral valve billows out and does not close properly. Learn about mitral valve prolapse causes, symptoms, treatment and prevention.
See more »Mittelschmerz
Mittelschmerz is ovular pain at or around the time of ovulation and is completely normal. Learn more about mittelschmerz causes, symptoms, tests, treatment and prevention.
See more »Mixed Receptive-expressive Language Disorder
Mixed receptive-expressive language disorder impairs the understanding and expression of language. Learn about mixed receptive-expressive language disorder causes, symptoms, tests, treatment and prevention.
See more »Mixed Tension Migraine
Mixed tension migraine is a headache with both tension and migraine headache features. Learn about mixed tension migraine causes, symptoms, treatment and prevention.
See more »Molluscum Contagiosum
Molluscum contagiosum is a contagious viral skin infection causing pearl-like papules. Learn about molluscum contagiosum causes, symptoms, treatment and prevention.
See more »Mongolian Blue Spots
Mongolian blue spots are benign bluish or bluish-gray skin markings appearing at or shortly after birth. Learn about Mongolian blue spots causes, symptoms, tests, treatment and prevention.
See more »Mononeuritis Multiplex
Mononeuritis multiplex is simultaneous or sequential damage to multiple nerve groups. Learn about mononeuritis multiplex causes, symptoms, treatment and prevention.
See more »Mononeuropathy
Mononeuropathy is single nerve or nerve group damage that causes movement or sensation loss. Learn about mononeuropathy causes, symptoms, treatment and prevention.
See more »Mononucleosis
Mononucleosis or mono, a viral infection, causes sore throat, fever, swollen lymph glands or rashes. Learn about mononucleosis causes, symptoms, tests, treatment and prevention.
See more »Morquio Syndrome
Morquio syndrome, type A or B, is abnormally large mucopolysaccharide deposits in the brain. Learn about Morquio syndrome causes, symptoms, treatment and prevention.
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Common Conditions:
