kýchnutím

Kýchnutím is the Czech word for a sneeze. A sneeze, also known as sternutation, is a sudden, involuntary expulsion of air from the nose and mouth due to irritation of the nasal mucous membranes. This reflex is a protective mechanism designed to clear the airways of foreign particles, allergens, or irritants.

The sensation preceding a sneeze often involves a tickling or itching feeling in the nose, followed by a forceful exhalation. The eyes typically close reflexively during a sneeze, and the body may arch backward. The sound produced by a sneeze can vary greatly among individuals.

Common triggers for sneezing include dust, pollen, animal dander, strong odors, sudden changes in temperature, bright lights (in some individuals, known as the photic sneeze reflex), and respiratory infections like the common cold or flu. While generally harmless, sneezing can sometimes spread germs and viruses through airborne droplets, which is why covering one's mouth and nose when sneezing is considered good hygiene. The act of sneezing is a complex physiological response involving various muscles and nerves.