Why do we sneeze

Chemical release is caused by viral respiratory infections, filtered particles, allergens substances that trigger allergic reactions or physical irritants such as smoke, pollution, perfumes and cold air.

Allergic reactions with the nasal mucosa require the presence of IgE allergy antibody specific for the allergen. This leads to fluid leakage from vessels in the nose, causing symptoms of congestion and nasal drip. Additionally, nerve endings are stimulated, leading to the sensation of itching.

Ultimately, the nerve ending stimulation leads to activation of a reflex inside the brain. The nervous impulse travels up the sensory nerves and down the nerves controlling muscles in the head and neck, and that leads to the rapid expulsion of air.

The high velocity of the airflow is achieved by the buildup of pressure inside the chest with the vocal chords closed. Sudden opening of the cords allows the pressurized air to flow back up the respiratory tract to expel the irritants.

This helps to remove offending particles in the nose. However, in infected individuals, it also allows for the spread of the common cold, as innumerable viral particles are contained within each droplet of mucus expelled.

Various medications are available to help control this reaction. Antihistamines act principally by blocking the action of histamine at receptors located on the blood vessels in the nose.

Some prescription antihistamines are nonsedating, compared with their over-the-counter counterparts. Sneezing - what is a sneeze, why do we sneeze and how to sneeze safely Wednesday 2 September Having a good sneeze can feel great, but what is the point of sneezing? What happens when I sneeze? Why do we always close our eyes when we sneeze? Why do I sneeze more than once?

Why is it so important to sneeze correctly? Is it bad to hold in a sneeze? What is the best way to sneeze? If you can, turn your head away from people when you cough or sneeze. Clean your hands often and with soap and water or alcohol-based hand rub for at least 20 seconds Don't sneeze into your hand. If you sneeze into your hand, clean your hand immediately. Other tips Wash your hands often and properly Avoid touching your eyes, nose and mouth Stay at home when you are unwell More information How does COVID spread and how can I stop myself from getting it?

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Allergic reactions, infections that impact your nose, colds, the flu and COVID can all cause sneezing. In some instances, a sneeze may be due to a photic reflex. This means that some people sneeze when they go out into the sun and are exposed to bright lights.

No one knows exactly what causes this type of sneeze. There are a few other actions that can set off a sneeze in some people. These causes include:.

A woman in England once sneezed for days straight, setting a world record! And the best way to stop it is to identify what the problem is.

Sneezes happen quickly — at a rate of miles per hour to be exact. Learn about the health care services we offer at Bon Secours.