Which condition would commonly require medical clearance before flight?

• A. Uncontrolled diabetes
• B. Mild seasonal allergies
• C. Occasional headaches
• D. Myopia

Answer: (A)

Medical clearance before flight is needed for conditions that can suddenly worsen or require ongoing medical management during travel. Uncontrolled diabetes fits this because blood glucose can swing unpredictably in flight, risking dangerous hypoglycemia or hyperglycemia. The in-flight environment—cabin pressurization, irregular meals, stress, and limited immediate medical care—can complicate glucose control, so a clinician confirms that the traveler can safely manage the condition with the right plan, medications, and monitoring. In contrast, mild seasonal allergies, occasional headaches, and myopia don’t typically create an acute in-flight safety risk that would necessitate preflight medical clearance.