The person that often side often has a cold, always say oneself is the resistance is not good to cause, is this really so?
Let's get to know a cold first. Cold is a kind of upper respiratory tract disease caused by virus or bacterial infection and allergic reaction, which can be divided into common cold and influenza. Influenza is caused by influenza virus infection, and the causes of common cold are more complex. The pathogens causing cold include a variety of bacteria and viruses, especially viruses.
The common viruses that can cause cold include rhinovirus, coronavirus, influenza virus, metapneumovirus, respiratory syncytial virus, adenovirus, Coxsackie virus, ECHO virus, enterovirus, etc. In general, the resistance of human upper respiratory tract mucosa decreases after virus infection. At this time, bacteria can take the opportunity to enter and cause more serious bacterial infection. Due to different virus infections and individual reactions, cold symptoms will be different, often with nasal congestion, runny nose, cough, sneezing, pharyngeal discomfort and other symptoms, severe fever can occur.
Autumn and winter season or season alternation, the weather is cold and changes quickly, the human body is difficult to adapt, at this time it is easy to catch a cold. In particular, the elderly, infants and children with congenital weakness are more likely to catch a cold and often occur. For example, infants and children, due to incomplete growth and development, their immune capacity is worse than adults, so they are easy to be infected and induce diseases when they encounter pathogens such as viruses and bacteria.
The elderly often because of the gradual degradation of organ function, coupled with some chronic diseases, the body immunity greatly decreased, but also easy to catch a cold. In addition, modern people's life is tense, work pressure is big, often stay up late, work in the air-conditioned environment for a long time, lack of necessary exercise, etc., can lead to physical decline, weakened body resistance, easy to catch a cold.
If a person often has a cold, in addition to the low immunity of the body, the cold virus itself is also an important influencing factor. It is understood that 90% of colds are caused by virus infection. Generally speaking, after the cold virus invades, the human body can produce antibodies against the virus. In the case of no serious complications, the cold can heal itself. However, the antibody of cold virus can not remain in the human body for a long time, and the immune function of antibody is specific, which can only target at a specific virus, but has no immune effect on other pathogens. There are many kinds of viruses that can cause colds. When the human body is cured by one virus, it may be infected by another virus.
Therefore, people may have recurrent colds in a short period of time. In addition, some cold viruses (such as influenza virus) are prone to mutation. Even if the human body has acquired a certain degree of immunity after infection with the virus, the virus itself can escape the attack of the immune system of the body, thus causing a cold again.
The incubation period of a cold is 1-3 days. Usually, symptoms such as throat discomfort or headache appear first, and then other symptoms follow. The third and fourth days are the most serious, which can be cured in about 1 week. Because there are many pathogens causing colds, there are no specific and effective drugs for colds. Generally, the drugs used to treat colds are only to relieve symptoms. Therefore, the prevention of colds is more important and effective than the treatment of colds.
So how to prevent a cold? No doubt, improving the body's resistance is the most important. To be specific, we should pay attention to balanced nutrition, eat more milk, eggs, fruits, vegetables and other foods rich in protein, inorganic salts and vitamins, so as to prevent the decline of resistance due to malnutrition. Should also carry out appropriate physical exercise, more outdoor activities, more sunshine (sunshine has a certain bactericidal effect and can promote calcium absorption), and breathe more fresh air. Through appropriate exercise to enhance their physical fitness, prevent the occurrence of cold. Pay attention to personal hygiene and develop good health habits are also important measures to prevent cold. For example, wash hands frequently, dry bedding frequently, keep indoor air circulation, cover mouth and nose when sneezing, wear masks, try not to go to crowded places, etc. In addition, influenza vaccine can also be inoculated to prevent the occurrence of influenza.