The functions of the nasal cavity: respiration, olfaction, resonance, protection; rhinitis: local inflammation of the mucosa of the nasal cavity; sinusitis: inflammation of the mucosa within the sinuses (there are four bony cavities containing air within the skull and the same as the nasal cavity, which are the sinuses); rhinitis sinusitis directly affects the four major functions of the nasal cavity is easy to understand; 1, respiratory function impact: nasal congestion; 2, olfactory function impact: can not smell, no appetite for food; 3, resonance function impact. Heavy nasal sound, inflammation in the sinuses will also lead to headache Chen Chao, Department of Otolaryngology, Head and Neck Surgery, Pediatric Hospital of Fudan University; 4. Protective function impact: loss of nasal warming, humidification and filtering function will cause secondary dry throat, sore throat, acute tonsillitis, epiglottitis, laryngitis, tracheobronchitis; Then, in the early stage of upper respiratory tract infection to control symptoms, protection of nasal function is the most important. Protection of respiratory function: the use of nasal decongestants, most of the oral cold medicines contain ephedrine to relieve nasal congestion, you can also spray nasal drops to control nasal congestion. After the nasal cavity is ventilated, the olfactory function and resonance function will be significantly improved. Protection of protective functions: After keeping the nasal passages open you can use nasal spray water to moisten the respiratory tract so that you can warm and humidify the air and breathe without causing dry throat and sore throat. It is also very important to treat the cause of the disease. If it is a viral infection, then you must drink more water and consume a lot of vitamin C, fruit juice, etc. If it is a bacterial infection, then you need to use antibiotic treatment, this depends on the doctor Oh!