Sinusitis is currently the general term for what was traditionally called accessory sinusitis. Accessory sinusitis can cause headaches, which is a clinical manifestation of sinusitis. The clinical treatment of headaches primarily targets the sinusitis itself. The causes of the headaches are twofold: one is the headache caused by the irritation of purulent secretions, and the other is the negative pressure headache caused by blockage of the sinus opening and the resultant intrasinus pressure. The treatment includes using medications that constrict the blood vessels in the mucous membranes and then clearing the sinus openings. Additionally, it is crucial to actively pursue anti-inflammatory and anti-infection treatments, primarily using macrolide antibiotics or cephalosporin antibiotics. (Medication should be used under the guidance of a doctor.)