Nose can not smell the odor may be with colds, chronic rhinitis, nasal polyps and so on caused by the loss of sense of smell, need to be based on the cause of the disease, take medication or surgical treatment. 1. Colds can lead to decreased sense of smell, accompanied by nasal congestion, runny nose, dizziness, headache, cough and other symptoms, you can take Lianhua Qingdian Pellet, Qingkailing Oral Liquid and other treatments. 2. Chronic rhinitis is caused by a variety of factors, there will be nasal congestion, runny nose, smell loss and other symptoms, need to clarify the cause of the treatment, often use budesonide nasal spray, fumar drops, etc. to relieve symptoms. 3. Nasal polyps causing nasal obstruction causing loss of smell is a common nasal mucosal lesion, the treatment is mainly surgical treatment, nasal polyp removal surgery. The causes of this symptom are many, but also can be seen in sinusitis, nasal cavity – sinus tumor, etc., it is recommended to actively consult a doctor to clarify the diagnosis and standardize the use of medication and diagnosis and treatment.