Why does the nose bleed easily?
Firstly because the nose is rich in blood vessels and superficially tortuous; reducing the evaporation of water from the nasal mucosa. The main role of the nasal mucosa is to heat and humidify the cold air entering the nasal cavity. This process takes away a large amount of water from the local nasal mucosa. The mucous membrane of the nasal cavity is vulnerable to all kinds of attacks, and secondly, because the nasal cavity is the gateway to the respiratory tract, it is susceptible to germs, together with trauma and other factors. The nasal cavity is densely vascularized and full of blood. If a small blood vessel ruptures, a lot of blood can flow out.
When is rhinorrhea likely to occur?
In spring or winter, the air is dry and the water of the nasal mucosa evaporates quickly. The dryness of the nasal mucosa increases the brittleness of the blood vessels and increases the chance of nasal bleeding. It is easy to be dry and accompanied by deviated nasal septum, capillaries are easy to rupture and bleed High blood pressure in the elderly, poor brittle elasticity of blood vessels, not easy to stop bleeding. The causes of rhinorrhea are many and can be broadly divided into: local causes: nasal trauma, inflammation, foreign bodies, tumors, etc.; systemic causes: acute hyperthermic diseases such as influenza, typhoid, malaria, scarlet fever, etc., cardiovascular system diseases such as high enemy pressure and arteriosclerosis, blood diseases and leukemia, hemophilia, aplastic anemia, platelet Decreased violet scar, chronic liver and kidney diseases, vitamin C and vitamin K deficiency, endocrine disorders, etc. Most of the bleeding occurs in the bleeding-prone area below the anterior nasal septum, and in the posterior part of the inferior nasal tract near the posterior end of the inferior turbinate in middle-aged and elderly people over 40 years old.