II. Causes: Allergic Rhinitis (50%)

  1. Seasonal Rhinitis 35%
  2. Perennial Rhinitis 15%
  3. Allergic Occupational Rhinitis
    1. Lab animal exposure (e.g. rodents)
    2. Grains
    3. Coffee beans
    4. Wood dust

III. Causes: Non-Allergic Rhinitis (50%)

  1. See all categories below
  2. Common causes of non-Allergic Rhinitis
    1. Viral Rhinitis (most common)
    2. Vasomotor Rhinitis 35%
    3. Nares Syndrome 10%
    4. Drug-Induced Rhinitis 5%

IV. Causes: Non-allergic Trigger related Rhinitis

  1. Drug-Induced Rhinitis
  2. Rhinitis Medicamentosa
  3. Nonallergic Rhinitis (Eosinophilia Syndrome)
  4. Exercise-induced Rhinitis
  5. Gustatory Rhinitis or other food reactions
  6. Vasomotor Rhinitis
  7. Emotional Rhinitis
  8. Irritant Rhinitis
    1. Tobacco smoke
    2. Perfumes
    3. Hair spray
    4. Ozone
  9. Irritant Occupational Rhinitis
    1. Chemicals
    2. Cleaning supplies
    3. Organic solvents
    4. Formaldehyde
    5. Sulfur
    6. Aerosols
  10. Chemical Dependency
    1. Alcohol Abuse
    2. Cocaine Abuse

V. Causes: Infectious Rhinitis

VI. Causes: Endocrine-related Rhinitis

  1. Hypothyroidism (may cause obstruction)
  2. Estrogen-related Rhinitis
    1. Pregnancy
    2. Menstrual Cycle
    3. Oral Contraceptives

VII. Causes: Mechanical Rhinitis

  1. Atrophic Rhinitis
  2. Ciliary Dyskinesia
  3. Deviated nasal septum
  4. Hypertrophic turbinates
  5. Nasal Polyps
  6. Foreign body
  7. Nasal Tumor or Sinus Tumor
  8. Congenital Choanal Atresia
  9. Meningocele
  10. Adenoids
  11. Variants of osteomeatal complex

VIII. Causes: Medical Condition related Rhinitis

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