Facial/Ear/Eye Pain:
Sinusitis
Otitis Media and Otitis Externa
Subconjunctival Hemorrhage
Corneal Abrasion or Corneal Ulcer
Facial bone fracture
Dyspnea:
Pneumonia
Congestive Heart Failure
Acute Asthma Exacerbation
COPD Exacerbation
Chest Pain:
Acute myocardial infarction
Pericarditis
GERD
Altered Mental Status:
Stroke
Meningitis or Encephalitis
Intracerebral Hemorrhage
Toxic Ingestion
Sinusitis
Otitis Media and Otitis Externa
Subconjunctival Hemorrhage
Corneal Abrasion or Corneal Ulcer
Facial bone fracture
Pneumonia
Congestive Heart Failure
Acute Asthma Exacerbation
COPD Exacerbation
Acute myocardial infarction
Pericarditis
GERD
Stroke
Meningitis or Encephalitis
Intracerebral Hemorrhage
Toxic Ingestion
Barotrauma of descent
Otic barotrauma
Pulmonary barotrauma
Sinus barotrauma
Mask squeeze
Barodentalgia (trapped dental air causing squeeze)
Barotrauma of ascent
Pulmonary barotrauma (pulmonary overpressurization syndrome)
Decompression sickness (DCS)
Arterial gas embolism
Alternobaric vertigo
Facial baroparesis (Bells Palsy)
At depth injuries
Oxygen toxicity
Nitrogen narcosis
Hypothermia
Contaminated gas mixture (e.g. CO toxicity)
Caustic cocktail from rebreathing circuit
Otic barotrauma
Pulmonary barotrauma
Sinus barotrauma
Mask squeeze
Barodentalgia (trapped dental air causing squeeze)
Pulmonary barotrauma (pulmonary overpressurization syndrome)
Decompression sickness (DCS)
Arterial gas embolism
Alternobaric vertigo
Facial baroparesis (Bells Palsy)
Oxygen toxicity
Nitrogen narcosis
Hypothermia
Contaminated gas mixture (e.g. CO toxicity)
Caustic cocktail from rebreathing circuit
Hypothermia
Immersion pulmonary edema
Marine toxins, envenomations, and bites<unk> 
Submersion injury (drowning and near-drowning)
Scuba diving emergencies
Facial/Ear/Eye Pain:
Heat stroke
Sinusitis
Electrical storm
Otitis Media and Otitis Externa
Environmental heat diagnoses
Subconjunctival Hemorrhage