All Diseases that Start with M (Rare, Deadly, and Many More!)

Welcome to our all-encompassing guide on diseases starting with the letter “M”. This blog will take you through a wide spectrum of diseases, ranging from those affecting blood, bones, eyes, and mental health to those impacting the lungs, skin, and even conditions found in dogs and cats.

We will also delve into deadly, rare, autoimmune diseases, as well as various bacterial infections. Prepare to gain valuable insights into these diverse medical conditions.

Top 30 Diseases that Start with M

Below are the 30 common diseases starting with the letter ‘M’.

• Malaria: Parasitic infection spread by mosquitoes.
• Melanoma: Serious type of skin cancer.
• Multiple Sclerosis: Autoimmune disease affecting the nervous system.
• Meningitis: Inflammation of brain and spinal cord membranes.
• Mononucleosis: Viral infection causing fatigue, and fever.
• Myopia: Nearsightedness, a common vision condition.
• Myocardial Infarction: Heart attack, due to heart blood flow blockage.
• Migraine: Recurrent, severe headaches.
• Myasthenia Gravis: Autoimmune disorder causing muscle weakness.
• Mumps: Viral infection affecting salivary glands.
• Macular Degeneration: Eye disease leading to vision loss.
• Melasma: Skin condition causing brown patches.
• Meniere’s Disease: Inner ear disorder causing vertigo.
• Myeloma: Type of blood cancer.
• Myelitis: Inflammation of the spinal cord.
• Mastitis: Breast tissue inflammation.
• Ménière’s Disease: Disorder affecting inner ear balance.
• Myositis: Inflammation and weakening of muscles.
• Metabolic Syndrome: Cluster of conditions increasing heart disease risk.
• Mesothelioma: Cancer caused by asbestos exposure.
• Mucopolysaccharidoses: Group of metabolic disorders.
• Myelofibrosis: Bone marrow disorder.
• Molluscum Contagiosum: Viral skin infection.
• Marfan Syndrome: Connective tissue disorder.
• Mitral Valve Prolapse: Heart valve disorder.
• Morton’s Neuroma: Foot condition causing pain.
• Microcephaly: Abnormal smallness of the head.
• Mycoplasma Infection: Bacterial lung infection.
• Mucositis: Painful inflammation and ulceration of mucous membranes.
• Myotonic Dystrophy: Type of muscular dystrophy.

Also, Check:

Medical Terms That Start With M

Fitness Words That Start With M

Rare Diseases That Start With M

• Moebius Syndrome: Congenital facial paralysis.
• Muckle-Wells Syndrome: Autoinflammatory disorder with rashes.
• Mucopolysaccharidosis: Metabolic disorder affecting sugar processing.
• Megalencephalic Leukoencephalopathy: Genetic brain white matter disease.
• Mayer-Rokitansky-Küster-Hauser Syndrome: Congenital reproductive system anomaly.
• Mastocytosis: Excess mast cells condition.
• McCune-Albright Syndrome: Disorder affecting bones, skin, and hormones.
• Marshall Syndrome: Genetic disorder affecting eyes, ears, and skeleton.
• Mucolipidosis: Group of metabolic disorders.
• Meige Syndrome: Neurological movement disorder.
• Metachromatic Leukodystrophy: Genetic metabolic condition.
• Melnick-Needles Syndrome: Rare bone disorder.
• Mulibrey Nanism: Growth disorder with muscle, liver, brain, and eye problems.
• Maple Syrup Urine Disease: Metabolic disorder affecting amino acid breakdown.
• Mucormycosis: Rare fungal infection.

Deadly Diseases That Start With M

• Meningococcal Disease: Severe bacterial infection causing meningitis or bloodstream infection.
• Melanoma: Aggressive skin cancer.
• Malaria: Life-threatening parasitic disease.
• Mesothelioma: Cancer caused by asbestos exposure.
• Myocardial Infarction: Heart attack, potentially fatal.
• Meningitis: Potentially deadly brain and spinal cord inflammation.
• Multiple Myeloma: Cancer of plasma cells in bone marrow.
• Marburg Virus: Severe hemorrhagic fever.
• MERS (Middle East Respiratory Syndrome): Severe respiratory illness.
• Metastatic Cancer: Cancer that has spread from its origin.
• Melioidosis: Bacterial infection with a high mortality rate.
• Mycetoma: Serious bacterial or fungal skin infection.
• Mycobacterium Avium Complex: Severe lung infection.
• Mycoplasmal Pneumonia: Serious lung infection.
• Mucormycosis: Serious fungal infection, often in immunocompromised patients.

Explore More Diseases Starting With:

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Other Diseases Beginning With M (Divided By Type)

Autoimmune Diseases That Start With M

• Multiple Sclerosis: Nervous system autoimmune disorder.
• Myasthenia Gravis: Muscle weakness autoimmune disease.
• Mixed Connective Tissue Disease: Overlap of various autoimmune disorders.
• Morvan Syndrome: Rare autoimmune neurological disorder.
• Mikulicz Disease: Chronic swelling of salivary glands.
• Mucha-Habermann Disease: Inflammatory skin disorder.
• Myositis: Inflammation and weakening of muscles.

Blood Diseases That Start With M

• Myelodysplastic Syndromes: Blood cell production disorders.
• Multiple Myeloma: Cancer of plasma cells in bone marrow.
• Myelofibrosis: Bone marrow scarring.
• Microangiopathic Hemolytic Anemia: Blood disorder affecting small vessels.
• Methemoglobinemia: Abnormal methemoglobin in blood.
• Monoclonal Gammopathy: Abnormal protein in blood.
• Malaria: Parasitic disease affecting red blood cells.

Bone Diseases That Start With M

• Marfan Syndrome: Connective tissue disorder.
• Melorheostosis: Rare bone thickening disorder.
• Multiple Epiphyseal Dysplasia: Abnormal bone growth.
• Maffucci Syndrome: Bone and skin growths.
• McCune-Albright Syndrome: Bone, skin, and hormonal disorder.
• Metabolic Bone Disease: Disorders affecting bone strength.
• Myeloma Bone Disease: Bone damage from myeloma.

Eyes Diseases That Start With M

• Macular Degeneration: Vision loss eye disease.
• Myopia: Nearsightedness, a common vision condition.
• Marfan Syndrome: Affects connective tissue, including eyes.
• Microphthalmia: Abnormally small eyes.
• Morning Glory Syndrome: Congenital optic disc anomaly.
• Macular Hole: Small break in the macula.
• Megalocornea: Enlarged cornea.

Ear Diseases That Start With M

• Meniere’s Disease: Inner ear disorder causing vertigo.
• Mastoiditis: Inflammation of mastoid bone near ear.
• Middle Ear Infection (Otitis Media): Infection in the middle ear.
• Myringitis: Inflammation of the eardrum.
• Microtia: Underdeveloped outer ear.
• Ménière’s Disease: Disorder affecting inner ear balance.
• Malignant Otitis Externa: Severe outer ear infection.

Hand Diseases That Start With M

• Madelung’s Deformity: Abnormal wrist bone growth.
• Mucopolysaccharidoses: Affects hand and finger movement.
• Marfan Syndrome: Affects connective tissue in hands.
• Myositis: Inflammation causing hand muscle weakness.
• Melorheostosis: Rare bone thickening in hands.
• Mallet Finger: Injury to finger tendon.
• Macrodactyly: Overgrowth of fingers or toes.

Lung Diseases That Start With M

• Mesothelioma: Lung cancer from asbestos.
• Mycoplasma Pneumonia: Bacterial lung infection.
• Mucormycosis: Fungal lung infection.
• Metastatic Lung Cancer: Secondary lung cancer.
• Middle East Respiratory Syndrome (MERS): Viral respiratory illness.
• Malignant Pleural Effusion: Fluid buildup due to cancer.
• Miliary Tuberculosis: Disseminated lung tuberculosis.

Liver Diseases That Start With M

• Metabolic Liver Disease: Disorders affecting liver metabolism.
• Malignant Hepatoma: Liver cancer.
• Methemoglobinemia: Liver disorder affecting oxygen in blood.
• Macronodular Cirrhosis: Large nodules on liver.
• Mucopolysaccharidoses: Affects liver storage cells.
• Mycotic Hepatitis: Fungal liver infection.
• Meigs’ Syndrome: Liver ascites with ovarian tumor.

Heart Diseases That Start With M

1. Myocardial Infarction: Heart attack, blood flow blockage.
2. Mitral Valve Prolapse: Heart valve disorder.
3. Myocarditis: Inflammation of heart muscle.
4. Marfan Syndrome: Affects the heart’s connective tissue.
5. Malignant Arrhythmia: Life-threatening heart rhythm issues.
6. Microvascular Angina: Small vessel heart disease.
7. Myxoma: Benign heart tumor.

Mental Diseases That Start With M

• Major Depressive Disorder: Persistent depressive mood.
• Mania: Bipolar disorder with high energy phases.
• Memory Loss: This can be due to various causes.
• Munchausen Syndrome: Faking illness for attention.
• Mental Retardation: Intellectual development disorder.
• Migraine with Aura: Severe headaches with sensory disturbances.
• Munchausen Syndrome by Proxy: Faking another’s illness.

Skin Diseases That Start With M

• Melanoma: Serious skin cancer.
• Melasma: Skin condition with brown patches.
• Molluscum Contagiosum: Viral skin infection.
• Mycosis Fungoides: Skin lymphoma.
• Miliaria (Heat Rash): Blocked sweat ducts.
• Morphea: Localized skin hardening.
• Merkel Cell Carcinoma: Rare skin cancer.

Bacterial Infection That Start With M

• Mycoplasma Pneumonia: Bacterial lung infection.
• Meningococcal Disease: Severe bacterial infection.
• Mycobacterium Avium Complex: Lung bacterial infection.
• Melioidosis: Bacterial infection with high mortality.
• Mycetoma: Skin bacterial or fungal infection.
• Mycobacterium Marinum Infection: Bacterial skin infection.
• Mastitis: Breast tissue bacterial infection.

Dog Diseases That Start With M

• Melanoma: Skin cancer in dogs.
• Mange: Skin disease caused by mites.
• Mast Cell Tumors: Common skin tumors in dogs.
• Myocarditis: Inflammation of the heart muscle.
• Myasthenia Gravis: Muscle weakness.
• Mycoplasma Infection: Bacterial infection affecting various organs.
• Meningoencephalitis: Inflammation of the brain and meninges.

Cat Diseases That Start With M

• Myeloproliferative Disorders: Blood cell production disorders.
• Mast Cell Tumors: Skin tumors in cats.
• Mange: Skin disease caused by mites.
• Mycoplasma Infection: Bacterial infection affecting various organs.
• Myocarditis: Inflammation of the heart muscle.
• Megaloesophagus: Enlarged esophagus.
• Melanoma: Skin cancer in cats.