Various methods of diagnosing allergic factors in chronic rhinitis are 
discussed. Among the procedures which aim at detecting specific allergens, i.e. 
skin testing, RAST, and nasal provocation tests, the last mentioned, as they are 
performed directly on the shock organ, have so far been found to give the most 
accurate picture of clinically dominant allergens and of the intensity and 
character of the rhinitis. However, information obtained by analysing the 
correlations between different procedures is not unanimous. As long as test 
techniques and allergen extracts have not been standardized, one particular test 
cannot be recommended as the method of choice.