Smell on both sides of the nose, for abnormal phenomenon, may be phantom smell; may also be from the nasal cavity with a foul smell, common in chronic atrophic rhinitis, sinusitis, etc.. Phantom smell, also known as change olfaction, there is no corresponding olfactory stimulus, can smell a specific odor, causing unpleasant emotional experience. Common in schizophrenia with certain subjects with organic temporal lobe disorders. Chronic atrophic rhinitis: manifested as dryness, itching, nasal congestion, nasal cavity wide, headache, olfactory loss, dry and atrophic nasal mucosa, or even fishy odor in the nose. Severe and accompanied by typical malodor, called “stinky nose syndrome. Exhalation with a special rotten odor, is due to stinky nose bacillus and other bacteria so that the nasal secretions and crusts within the protein decomposition and produce odor. Sinusitis: When pus accumulates in sinusitis, there may be odor in the nasal cavity. If you notice a foul odor on both sides of your nose, go to the hospital to find out the cause.