You say toenail fungus but do you have toenail fungus? Let me play doctor with your toes here. Differential:

• Toenail fungus (patient’s diagnosis is correct)
• Athlete’s foot (the patient is correct but doesn’t know the difference between toenail fungus and Athlete’s foot)
• A bad nail (insufficient blood circulation corrupts the nail - no fungus)

What else people? Give me ideas here!