Usually, we often see such children, because they are often sick since childhood (mainly respiratory diseases, such as colds, tonsillitis, bronchitis, pneumonia, asthma, etc.), they are relatively weak, and when there is wind, they have to run to the hospital, either high fever, cough, or skin allergies, etc.. The children themselves suffer a lot, and the parents are also very tired. As children grow older, these children will gradually improve their physical fitness and reduce sickness in primary and secondary school, but there is still a large gap compared to their peers. Therefore, it is necessary to take timely measures to enhance physical fitness. Of course, a single measure is often ineffective, but also need to “integrated management”: First, the first signs of illness in time to treat, to avoid further development. Generally speaking, diseases such as colds have a tendency to heal themselves, and excessive treatment is not advocated. But this kind of children because of physical reasons, the pathology is very easy to develop, from the flu to bronchitis, pneumonia at any time. In terms of treatment, it should be timely to prevent further development, the antibiotics should also be used in a timely manner. Second, the usual appropriate exercise to enhance physical fitness. Parents are not unaware of the importance of exercise, but are often more worried about their children sweating and getting cold, which leads to colds and illnesses, and over time it becomes a restriction on children’s exercise. In fact, this worry is unnecessary, children in the process of exercise sweat, body functions in a state of hyperactivity, this time is not easy to catch a cold. The only thing you should pay attention to is to reduce your clothes as appropriate to avoid sweating too much. When you stop exercising, you need to dry your sweat and put on your clothes in time. Thirdly, you should start to wash your face with cold water in summer and continue to do so throughout winter. We can find that people who regularly take cold baths or winter swimming rarely catch a cold because their skin has adapted to this cold stimulation. Children with weak constitutions can achieve similar results by gradually washing their faces with cold water (preferably with their own wet towels and dried towels) from summer onwards. In fact, this can also be seen as a kind of skin vascular exercise. Fourth, clothing should be reduced appropriately. Because the child is weak, many parents deliberately give him (her) more clothes and quilts, even more than the normal increase, in fact, this is not correct. Generally speaking, children are more afraid of heat than adults, and if they are covered too tightly, they are prone to sweating and catching a cold, so that adding clothes and quilts – sweating – catching a cold – adding clothes and quilts again, forming a vicious circle. As the old saying goes: “If you want your child to be safe, three points of hunger and cold”, which is very reasonable. Fifth, reduce the exposure to allergic substances. Most of these children have allergies, and allergens include food, pollen and other aspects. In the continuous strengthening of physical fitness, but also to minimize the exposure to allergic substances, such as food shrimp, crab, etc. to eat less, try to prevent mosquito bites, avoid the stimulation of pollen, dust, and so on.