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  1. Mad Cow Disease
  2. Maggie: Making Room for Worth-It Foods
  3. Maggie Morris: Plan Ahead When You Eat Out
  4. Maggie's Story: Making Changes for Her Health
  5. Maggie's Strategies for Eating Healthy
  6. Magnesium (Mg) Test - Medical Test
  7. Magnetic Field Therapy
  8. Magnetic Resonance Angiogram (MRA) - Medical Test
  9. Magnetic Resonance Cholangiogram
  10. Magnetic Resonance Imaging (MRI) - Medical Test
  11. Magnetic Resonance Imaging (MRI) of the Abdomen - Medical Test
  12. Magnetic Resonance Imaging (MRI) of the Breast - Medical Test
  13. Magnetic Resonance Imaging (MRI) of the Head - Medical Test
  14. Magnetic Resonance Imaging (MRI) of the Knee - Medical Test
  15. Magnetic Resonance Imaging (MRI) of the Shoulder - Medical Test
  16. Magnetic Resonance Imaging (MRI) of the Spine - Medical Test
  17. Major Nutrients in Food
  18. Make the Most of Your Doctor Visit (video)
  19. Making a Change That Matters
  20. Making a Plan to Help Someone Get Treatment for Alcohol Use Disorder
  21. Making It Easier to Wear a Mask During COVID-19
  22. Making Meals With Less Sodium (video)
  23. Making Positive Changes in Your Life After Quitting Smoking
  24. Making the Most of Your Appointment
  25. Making Wise Health Decisions
  26. Making Your Change Happen
  27. Malabsorption Syndrome
  28. Malaria
  29. Male Breast Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  30. Male Breast Cancer Treatment (PDQ®): Treatment - Patient Information [NCI]
  31. Male Condoms
  32. Male Genital Problems and Injuries
  33. Malignant Mesothelioma Treatment (Adult) (PDQ®): Treatment - Health Professional Information [NCI]
  34. Malignant Mesothelioma Treatment (Adult) (PDQ®): Treatment - Patient Information [NCI]
  35. Mallet Toe: Should I have surgery?
  36. Malocclusion and Orthodontics
  37. Mammogram - Medical Test
  38. Mammogram: What to Expect (video)
  39. Manage Stress for Your Heart
  40. Managing a Croup Attack (video)
  41. Managing Job Stress
  42. Managing Morning Sickness (video)
  43. Managing Pain While You're in the Hospital (video)
  44. Managing Parenting Stress During the Pandemic
  45. Managing Relationship Stress for Couples
  46. Managing Relationship Stress for Families
  47. Managing Seasonal Allergies (video)
  48. Managing Your Medical Bills
  49. Managing Your Medicines (video)
  50. Managing Your Toddler's Frustrating Behaviors
  51. Manual Therapy for Neck Pain
  52. Marijuana
  53. Marine Stings and Scrapes
  54. Marine Toxins
  55. Martha's Story: A Voice for Recovery
  56. Marvin's Story: Coping After the Hurricane
  57. Massage Therapy
  58. Massage Therapy During Pregnancy
  59. Mastectomy (video)
  60. Mastectomy, Deciding About Breast Reconstruction
  61. Mastectomy (Removal of the Breast) for Breast Cancer
  62. Mastectomy: Returning Home (video)
  63. Master List of Medicines
  64. Mastitis While Breastfeeding
  65. Maze Procedure
  1. Meal Planning
  2. Measles (Rubeola)
  3. Measuring the Intensity of Your Activity (video)
  4. Measuring Your Waist
  5. Media and Your Child: Making Choices
  6. Medial Collateral Ligament (MCL) Injury
  7. Mediastinoscopy - Medical Test
  8. Medical Abortion Care
  9. Medical and Other Transition Options for Transgender People
  10. Medical Checkups for Adolescents
  11. Medical History and Physical Exam for Dementia or Alzheimer's Disease
  12. Medical Marijuana
  13. Medical Specialists
  14. Medical Tests: Questions to Ask the Doctor
  15. Medicare Hospice Benefit
  16. Medicare: What You Need to Know
  17. Medicinal Mushrooms (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI]
  18. Medicinal Mushrooms (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]
  19. Medicine Blood Level Test - Medical Test
  20. Medicine for High Blood Pressure (video)
  21. Medicine or Other Drug Use and Sleep Problems
  22. Medicines and Mouth Problems
  23. Medicines and Other Substances That Can Cause Symptoms of Depression
  24. Medicines and Sun Exposure
  25. Medicines and Urinary Symptoms
  26. Medicines During Pregnancy
  27. Medicines for ADHD (Attention Deficit Hyperactivity Disorder)
  28. Medicines for Bone Loss
  29. Medicines for Cluster Headaches
  30. Medicines for Depression (video)
  31. Medicines or Vitamins That Can Cause Gas, Bloating, or Burping
  32. Medicines That Can Cause Abdominal Pain
  33. Medicines That Can Cause Acute Kidney Injury
  34. Medicines That Can Cause Blisters
  35. Medicines That Can Cause Bruises
  36. Medicines That Can Cause Changes in Heart Rate or Rhythm
  37. Medicines That Can Cause Changes in Menstrual Bleeding
  38. Medicines That Can Cause Confusion or a Decreased Alertness
  39. Medicines That Can Cause Constipation
  40. Medicines That Can Cause Diarrhea
  41. Medicines That Can Cause Headache
  42. Medicines That Can Cause Heartburn
  43. Medicines That Can Cause Nausea and Vomiting
  44. Medicines That Can Cause Pancreatitis
  45. Medicines That Can Cause Tinnitus
  46. Medicines That Can Cause Weakness or Fatigue
  47. Medicines That Cause Hearing Loss
  48. Medicines That Increase the Chance for a Heat-Related Illness
  49. Medicines That May Cause a Rash
  50. Medicines That May Cause Arm or Leg Problems
  51. Medicines That May Cause Lightheadedness or Vertigo
  52. Medicines That May Cause Rashes in Children
  53. Medicines That May Cause Vaginal Symptoms
  54. Medicines to Prevent Abnormal Heart Rhythm in Heart Failure
  55. Meditation
  56. Mediterranean Diet
  57. Melanoma Excision Surgery
  58. Melanoma Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  59. Melanoma Treatment (PDQ®): Treatment - Patient Information [NCI]
  60. Melatonin
  61. Memory Problems: Issues With Driving
  62. Memory Problems: Tips for Helping the Person With Daily Tasks
  63. Memory Problems: Wandering
  64. Menarche
  65. Ménière's Disease
  66. Meningitis
  67. Meningococcal ACWY Vaccine: What You Need to Know
  68. Meningococcal B Vaccine: What You Need to Know
  69. Meniscectomy for a Meniscus Tear
  70. Meniscus Repair
  71. Meniscus Surgery (video)
  72. Meniscus Surgery: Recovery Time
  73. Meniscus Tear
  74. Meniscus Tear: Rehabilitation Exercises
  75. Meniscus Tear: Should I Have a Diagnostic Test (MRI or Arthroscopy)?
  76. Meniscus Tear: Should I Have Surgery?
  77. Menopause and Perimenopause
  78. Menopause and Your Risk for Other Health Concerns
  79. Menopause: Managing Hot Flashes
  80. Menopause: Should I Use Hormone Therapy (HT)?
  81. Menopause: Wild Yam and Progesterone Creams
  82. Men's Health
  83. Menstrual Cramps
  84. Menstrual Cups
  85. Menstrual Cycle: Dealing With Cramps
  86. Menstrual Diary to Monitor Premenstrual Symptoms
  87. Menstruation: Not Having a Period by Age 15
  88. Mental and Behavioral Health
  89. Mental Health Assessment - Medical Test
  90. Mental Health Problems and Stigma
  91. Merkel Cell Carcinoma Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  92. Merkel Cell Carcinoma Treatment (PDQ®): Treatment - Patient Information [NCI]
  93. Metabolic Syndrome
  94. Metastatic Melanoma
  95. Metastatic Squamous Neck Cancer With Occult Primary Treatment (Adult) (PDQ®): Treatment - Health Professional Information [NCI]
  96. Metastatic Squamous Neck Cancer with Occult Primary Treatment (Adult) (PDQ®): Treatment - Patient Information [NCI]
  97. Metformin and You: A Winning Strategy (video)
  98. Metformin for diabetes
  99. Methamphetamine
  100. Methicillin-Resistant Staphylococcus Aureus (MRSA)
  1. Middle East Respiratory Syndrome (MERS)
  2. Migrain Headache Prevention, Should I take Medication?
  3. Migraine Headache Triggers
  4. Migraine Headaches
  5. Migraines: Finding and Avoiding Triggers
  6. Mild Cognitive Impairment and Dementia
  7. Mild, Moderate, and Severe Vertigo
  8. Mild, Moderate, or Severe Diarrhea
  9. Milestones for 10-Year-Olds
  10. Milestones for 2-Year-Olds
  11. Milestones for 3-Year-Olds
  12. Milestones for 4-Year-Olds
  13. Milestones for 5-Year-Olds
  14. Milestones for 6-Year-Olds
  15. Milestones for 7-Year-Olds
  16. Milestones for 8-Year-Olds
  17. Milestones for 9-Year-Olds
  18. Milestones for a 1-Year-Old
  19. Milestones for Ages 11 to 14
  20. Milestones for Ages 15 to 18
  21. Milestones for an 18-Month-Old Child
  22. Military Sexual Trauma
  23. Milk Oversupply
  24. Milk Thistle
  25. Milk Thistle (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI]
  26. Milk Thistle (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]
  27. Mind-Body Wellness
  28. Mindfulness: Breathing Exercise (video)
  29. Mindfulness: Breathing Practice (video)
  30. Mindfulness Tips for Teens (video)
  31. Mindfulness: What Is It? (video)
  32. Mindfulness-Based Stress Reduction
  33. Minerals: Their Functions and Sources
  34. Miscarriage
  35. Miscarriage: Should I Have Treatment to Complete a Miscarriage?
  36. Misdiagnosis of Lyme Disease
  37. Missed or Irregular Periods
  38. Missed Periods and Endurance Training
  39. Mistletoe Extracts (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI]
  40. Mistletoe Extracts (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]
  41. Mitochondrial Diseases
  42. Mitral Valve Prolapse
  43. Mitral Valve Regurgitation
  44. Mitral Valve Regurgitation: Repair or Replace the Valve?
  45. Mitral Valve Repair Surgery
  46. Mitral Valve Replacement Surgery
  47. Mitral Valve Stenosis
  48. Mitral Valve Stenosis: Repair or Replacement?