Children with colds and fevers are a headache for many parents. Parents are often worried about frequent colds in particular. Why do some children always have colds? What can I do to improve my child’s resistance? How many colds a year is considered normal? Many parents have the same confusion: Why does my child always catch a cold, is the resistance too poor? In fact, it is normal for children to catch a cold or fever, so parents should not worry too much. Specifically, it is not a big problem for children under 2 years old to have upper respiratory tract infections up to 7 times a year, children under 5 years old up to 6 times a year, and children under 14 years old up to 5 times a year. There is no need to take special protective measures other than what is usually done to prevent colds. Why are children more susceptible to colds than adults? This is mainly because children’s immune function is not fully mature, and repeated colds and fevers are a physiological process in which they experience the “test” of viruses and gradually improve their immune function. There are many types of viruses, such as influenza virus, parainfluenza virus, rhinovirus, parapneumovirus, coronavirus, coxsackievirus, adenovirus, etc. In addition, viruses are constantly mutating, and children have to go through them all before they can have immunity. Also, children have more chances to get infected with various viruses in close contact with other children in kindergarten or school, so they often get colds and fever. What are the causes of poor resistance? If a child has more than the normal number of colds in a year, it may mean that his resistance is poorer than his peers and his immune function is relatively weak, which needs to be noticed by parents. Poor resistance in children is first of all related to genetics. At the most extreme, there is a congenital deficiency in immune function, a lack of certain antibodies or lymphocytes, and these conditions can lead to serious infections. In addition, premature birth, relatively poor overall level of development, unbalanced nutrition, especially vitamin and protein deficiencies can also lead to children being prone to colds. Another environmental factor that is extremely easy to overlook is humidity. Studies have confirmed that viral bacteria tend to thrive in an environment with a relative humidity of 60% to 80%. Therefore, keeping indoor air circulating is an important way to prevent colds. How to make colds come less often? One, stay away from the source of infection. For those children who have poor resistance, parents should minimize taking them to places with lots of people and poor air circulation. Parents should have less contact with their children when they have a cold, or if this cannot be avoided, wear a mask to reduce the likelihood of their child being infected. Second, avoid allergens. Many recurrent respiratory infections are caused by allergies, for which it is important to first find out what the child is allergic to, i.e. what the allergen is. Only then can appropriate measures be taken to avoid the allergen. If the child is allergic to certain foods, then he or she can eat them again after avoiding them for a period of time, but for some foods such as walnuts and peanuts, he or she may have a lifelong allergy. If the child is allergic to pollen and other inhalants, he or she should minimize visits to botanical gardens, suburbs and other places where allergens are concentrated. Parents of allergic children, especially those who are allergic to dust mites, should pay attention to maintaining home hygiene. Third, develop the habit of going to bed early. Young children over the age of 1 should develop the habit of eating on their own, not over eating, regular rationing and balanced nutrition. It is also important to develop the habit of going to bed early. Parents should urge their children to go to bed before 8:30 p.m. as much as possible and ensure their sleep quality. Fourth, the appropriate amount of exercise. Moderate jogging, swimming and other exercises are recommended. Five, natural remedies. Appropriate more sunshine, which is conducive to the absorption of calcium, and thus improve the physique. To the natural environment, clean air in the mountains or warm climate areas for “air bathing”, for those dust mite allergies or is a deficient cold body of the child is of great help. Six, don’t get a drip as soon as you get a cold. Many children have a cold and fever, parents ask the doctor to give the child antibiotics, drip. I do not know that the main source of the cold is the virus, and bacterial infection only accounts for about 10%. Antibiotics are only effective for colds caused by bacteria, and can only play the role of a “placebo” for most viral colds, so using antibiotics at every turn will lower your child’s immunity. Some parents worry that the fever will “burn out” the child’s brain. This worry is actually unnecessary. The temperature is not necessarily related to the severity of the disease, and some children have a high temperature despite a mild viral infection.