 Every patient older than 18 years old whom underwent sinuses or facial computed tomography will be asked to answer a questionnaire, where he will be able to describe his headache features if present . This information will be correlated with patient images findings, which are going to be evaluated by head and neck radiologists blinded for clinical information. Logistic regression model will be used to verify this association; the presence of sinusitis and fever will used be as covariates. 