Sinusitis: An Issue of Otolaryngology ClinicsAbout This Hardback The inflammation of the mucous membrane which lines the sinuses is referred to as sinusitis. It is also known as a sinus infection. The most common symptoms of sinusitis include a plugged nose, facial pain and thick nasal mucous. It may also exhibit other symptoms such as fever, headache, sore throat, cough and poor sense of smell. It is caused due to infections in the respiratory tract, allergies and air pollution. It can also be