What are the clinical symptoms of nasal pus with odor, and how to diagnose with this disease: Clinical symptoms Pus anion: nasal anion is mostly purulent or mucopurulent, yellow or yellow-green, the amount is variable, mostly flowing to the throat, unilateral with odor, mostly seen in odontogenic maxillary sinusitis. Nasal congestion: varying in severity, mostly due to congestion and swelling of the nasal mucosa and increased secretions, nasal congestion can often cause temporary olfactory impairment. Headache: Chronic purulent sinusitis generally has obvious local pain or headache, if there is a headache, it is often manifested as a dull pain or a heavy feeling in the head, heavy during the day and light at night, the anterior group of sinusitis mostly shows swelling or boring pain in the forehead and nasal root, the headache of the posterior group of sinusitis is in the top of the head, temporal or posterior occipital region, when suffering from odontogenic maxillary sinusitis, it is often accompanied by ipsilateral superior toothache. Other: Due to the flow of pus into the pharynx and long-term breathing through the mouth, it is often accompanied by symptoms of chronic pharyngitis, such as sputum, foreign body sensation or dry and painful pharynx, etc. If it affects the eustachian tube, it can also have symptoms such as tinnitus and deafness. The characteristics of each sinusitis are described as follows: 1, chronic maxillary sinusitis is the most common of the chronic purulent sinusitis, more pus, if the odontogenic pus often has a foul odor. The examination shows that the middle turbinate is enlarged or hypertrophy, polyp-like changes, the middle and posterior part of the middle nasal tract, the surface of the inferior turbinate and even the base of the nose have mucopurulent secretions, and the maxillary sinus has mucopurulent effusion by puncturing the sinus. 2, chronic ethmoiditis (chronic ethmoiditis) often combined with chronic maxillary sinusitis, in addition to the general symptoms of chronic purulent sinusitis, olfactory hyposmia is more obvious. The presence of multiple polyps and pus in the middle nasal tract and olfactory groove is often seen, and the septum is cloudy or the atrial septum disappears on X-ray sinus radiographs. 3, chronic frontal sinusitis (chronic frontal sinusitis) often exists in combination with other sinusitis in the previous group. The diagnosis can be clarified by X-ray sinus frontal and lateral radiographs. 4, chronic sphenoiditis (chronic sphenoiditis) alone is rare, often sieve sinusitis occurs at the same time, if chronic purulent sinusitis has spread to the pterygoid sinus, most have formed a full sinusitis. The clinical presentation is similar to that of chronic septal sinusitis and maxillary sinusitis, and the presence of pteronasal sinusitis can be confirmed by radiography.