Ethmoid sinusitis is an inflammation of the ethmoid sinuses, which are located between the eyes and are part of the nasal cavity. This condition can occur due to infections, allergies, or nasal polyps, leading to symptoms such as nasal congestion, facial pain, and a reduced sense of smell. Treatment for ethmoid sinusitis often includes nasal decongestants, saline nasal sprays, and sometimes antibiotics if a bacterial infection is present. In chronic cases, a healthcare provider may recommend further interventions, such as surgery, to improve drainage and relieve symptoms.