Asthma control is assessed by daytime symptoms, limitation of activities, nocturnal symptoms/awakening, need for reliever/rescue treatment, and lung function. Several composite control measures, such as ACT10 and the Asthma Control Questionnaire,11 have been developed and are being validated. We have developed a new questionnaire, the G scale, to evaluate the symptoms of rhinosinusitis, as well as the symptoms of asthma, in asthmatic patients. Unexpectedly, asthma symptoms were not well controlled in about one-third of patients, despite taking controller medications. This result suggests that asthma symptoms might be underestimated by doctors in patients treated continuously. Evaluation of asthma control and rhinosinusitis symptoms using the G scale was considered not always superior to a combination of ACT with the SACRA questionnaire, which was designed to reflect asthma control and the condition of allergic rhinitis. However, the G scale might be convenient for screening the concomitant sinusitis, because it contains a question on olfactory dysfunction, which suggests the presence of sinusitis. Certainly, imaging with CT or magnetic resonance imaging (MRI) is much more useful for an accurate and objective diagnosis of sinusitis.