The nose is not ventilated spray medicine is good not spray on the blockage is often associated with chronic simple rhinitis, drug rhinitis, acute rhinitis and other diseases. 1. Chronic simple rhinitis: various causes of chronic inflammatory diseases of the nasal mucosa and submucosa, inflammatory stimuli will lead to mucosal congestion, edema, symptoms of nasal congestion, the use of drugs after the nasal mucosal congestion, edema will improve. 2. Drug rhinitis: drug rhinitis and long-term use of nasal decongestant caused by spraying the symptoms of relief, no medication, nasal congestion aggravated, the patient often increase the number of drops of medication on their own, so that a vicious cycle occurs, known as the phenomenon of multi-purpose decongestion. 3. Acute rhinitis: viral, bacterial infection triggered by the nasal mucosa and submucosal acute inflammatory reaction, there may be mucosal congestion, edema changes, more in the nasal spray decongestant after ventilation improvement, the drug weakened nasal congestion resurfaced. Nasal dyspnea, should actively seek medical attention, after a clear diagnosis, follow the doctor’s instructions standardized treatment, to avoid improper treatment, resulting in the disease is not cured.