Which family member does the patient mention having allergies?

The identification of the sister with hay fever as the family member with allergies is significant because it highlights a direct link between the patient’s potential genetic predisposition to allergic conditions. Hay fever, or allergic rhinitis, is a common immunological response that can run in families, suggesting a hereditary component to the patient's own allergic symptoms. The mention of a sibling having a specific form of allergies provides context for understanding the patient's health background and may guide further assessments and recommendations regarding allergy management or testing.

While family history can include a variety of allergic conditions, the sister's experience with hay fever provides the most relevant connection to allergic reactions, which are often linked to environmental triggers. This familial context can be crucial for identifying potential allergens the patient might be exposed to and tailoring an appropriate management plan.