Learn more about what ails you. Here are some common symptoms.
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: Obsessive-compulsive Disorder
Obsessive compulsive disorder (OCD) is an anxiety disorder where a person performs tasks to relieve obsessions. Learn about obsessive compulsive disorder symptoms, tests and treatments. See more »
Mosaicism
Mosaicism, a condition defined by two genetically different cell populations causing abnormalities. Learn about mosaicism causes, symptoms, tests, treatment and prevention.
See more »Mouth Ulcers
Mouth ulcers are sores or open lesions within the mouth from various disorders. Learn about mouth ulcer causes, symptoms, treatment and prevention.
See more »MRSA Infection
MRSA infection is an infection by antibiotic resistant common bacteria due to a weakened immune system. Learn about MRSA infection causes, symptoms, tests, treatment and prevention.
See more »Mucormycosis
Mucormycosis is a fungal infection of the brain, lungs or sinuses. Learn about mucormycosis causes, symptoms, treatment and prevention.
See more »Mucous Cyst
Mucocele or mucous cyst is a harmless, painless fluid filled thin sac inside one’s mouth. Learn about mucocele causes, symptoms, tests, treatment and prevention.
See more »Multi-infarct Dementia
Multi-infarct dementia or MID, the third most common dementia, is a stroke caused dementia. Learn about multi-infarct dementia causes, symptoms, tests, treatment and prevention.
See more »Multifocal Atrial Tachycardia
Multifocal atrial tachycardia (MAT) is a rapid heart rate due to inappropriate electrical impulses. Learn about MAT causes, symptoms, treatment and prevention.
See more »Multiple Endocrine Neoplasia (MEN) II
Multiple Endocrine Neoplasia (MEN) II is thyroid cancer with recurring adrenal gland cancer. Learn about MEN II causes, symptoms, treatment and prevention.
See more »Multiple Endocrine Neoplasia Type I
Multiple Endocrine Neoplasia (MEN) I is adenoma or hyperplasia of an endocrine gland. Learn about MEN I causes, symptoms, treatment and prevention.
See more »Multiple Lentigines Syndrome
Multiple lentigines syndrome is and inherited disorder causing increased numbers of lentigines. Learn about multiple lentigines syndrome causes, symptoms, treatment and prevention.
See more »Multiple Myeloma
Multiple myeloma is cancer of the bone marrow’s plasma cells. Learn about multiple myeloma causes, symptoms, treatment and prevention.
See more »Multiple Sclerosis
Multiple sclerosis or MS is a disease where one’s immune cells attack the central nervous system. Learn about multiple sclerosis causes, symptoms, tests, treatment and prevention.
See more »Multiple Sclerosis - Resources
Multiple sclerosis resources. Multiple sclerosis support, information and contacts.
See more »Multiple System Atrophy
Multiple System Atrophy information from HowStuffWorks. Learn about causes, symptoms and treatments of Multiple System Atrophy.
See more »Mumps
Mumps is an acute, contagious, viral disease causing swelling of the salivary glands. Learn about mumps causes, symptoms, tests, treatment and prevention.
See more »Munchausen Syndrome By Proxy
Munchausen Syndrome By Proxy information from HowStuffWorks. Learn about causes, symptoms and treatments of Munchausen Syndrome By Proxy.
See more »Muscular Dystrophy
Muscular dystrophy is a group of disorders causing progressive muscle deterioration and weakness. Learn about muscular dystrophy causes, symptoms, tests, treatment and prevention.
See more »Myasthenia Gravis
Myasthenia gravis is an immune response causing variable weakness of voluntary muscles. Learn about myasthenia gravis causes, symptoms, treatment and prevention.
See more »Mycoplasma Pneumonia
Mycoplasma pneumonia is an infection of the lungs from bacteria, viruses or infectious organisms. Learn about mycoplasma pneumonia causes, symptoms, tests, treatment and prevention.
See more »Myelomeningocele (children)
Myelomeningocele (children) is a birth defect where the backbone and spinal canal do not close before birth. Learn about myelomeningocele causes, symptoms, treatment and prevention.
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