Menstrual cramps
Mental retardation
Metatarsalgia
Migraine headache
Migrainous neuralgia
Miliaria rubra
Miliary tuberculosis
Miscarriage
Mittelschmerz
Mixed connective tissue disease
Molluscum contagiosum
Monilial vulvovaginitis
Morning sickness
Morphea
Motor neuron disease
Mucocutaneous ocular syndrome
Mucopurulent cervicitis
Mucous colitis
Multi-infarct dementia (MID)
Multiple myeloma
Mumps
Muscle contraction headache
Muscular dystrophy
Myasthenia gravis
Myelitis
Myeloma, plasma cell
Myocardial infarction
Myocarditis, viral
Myofascial pain-dysfunction (MPD) syndrome
Myoma of uterus
Myometritis
Myopic degeneration