Nasal allergy.

Allergic rhinitis is often trivialised but accurate diagnosis and institution of therapy greatly alleviate its symptoms. Diagnosis requires a careful history and nasal mucosal examination. Nasal smear eosinophil staining and skin tests can be helpful, but skin and nasal provocation testing should be controlled and related specifically to a patient's history. Recent advances in symptomatic treatment, particularly antihistamines and most cell stabilising drugs, and immunotherapy are considered.