Nasal spray oil are also available. There is however no trial-verified evidence that they have a measurable effect on symptoms. Decongestant nasal sprays are available over-the-counter in many countries. They work to very quickly open up nasal passages by constricting blood vessels in the lining of the nose. Prolonged use of these types of sprays can damage the delicate mucous membranes in the nose. This causes increased inflammation, an effect known as rhinitis medicamentosa or the rebound effect. Decongestant nasal sprays are advised for short-term use only, preferably 5 to 7 days at maximum. Some doctors advise to use them 3 days
Nasal concha sinus ostia and can result in recurrent sinusitis. Generally, in animals, nasal conchae are convoluted structures of thin bone or cartilage located in the nasal cavity. These are lined with mucous membranes that can perform two functions. They can improve the sense of smell by increasing the area available to absorb airborne chemicals, and they can warm and moisten inhaled air, and extract heat and moisture from exhaled air to prevent desiccation of the lungs. Olfactory turbinates are found in all living tetrapods, and respiratory turbinates are found in most mammals and birds. Animals with respiratory turbinates can breathe faster