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Dear Student.
Please find below the solution to the asked query.
 
Nasal spray contains various types of medicine as well as solutions such as xylometazoline, antibiotic, saline solution, steroids etc. Most of the nasal spray works by narrowing the blood vessel present inside the lining of the nose, thus decreasing the blood flow which ultimately reduces the feeling of congestion. Nasal spray also acts on various receptors so to reduce the inflammation, as a result of which production of mucus decreases. This way nasal spray relieves a person from blocked nose.

Hope this information will clear your doubts about the topic.
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