<unk>  can be classified based on the duration as acute<unk>  or chronic<unk> . Additionally,<unk>  may be classified broadly according to the causative agent as infectious or non-infectious.
Pharyngitis classification
Laryngitis classification
Rhinitis classification
Rhinosinusitis classification
Tonsillitis classification
Conjunctivitis classification
Mastoiditis classification
Esophagitis classification