Hot weather, can it cause children to have a fever?

These days, the big sun has scorched the land of Bamin, and many parents with children can suffer. What they have suffered is not the trivia of children eating and drinking Lazar, but that many babies have had high fever in succession recently. Can you catch a cold if you stay in an air-conditioned room for a long time? That is wrong. In fact, except for some children who have a fever because of a cold, most children have a fever in summer. After taking the medicine, the child's fever still persists. Doesn't this worry many young parents? They don't know what to do. Today, the reporter invited Li Xuelin, director of the Provincial People's Hospital, to talk about what summer heat is. Dr. Li Xuelin, the chief physician of this project: The body temperature of normal people in Xingyuan Traditional Chinese Medicine Clinic of Fujian Provincial People's Hospital is so balanced, so what is summer heat? In order to understand summer fever, we must first understand what our normal thermoregulation is. "Under normal circumstances, the temperature set by the brain is generally constant." Dr. Li said that when determining the set point of body temperature, the thermoregulatory center will send a signal to balance the heat generation and heat dissipation process at this temperature. When the ambient air temperature is lower than the body surface temperature, the human body can reduce the body temperature by radiating heat; On the contrary, when the ambient temperature is higher than the body surface temperature, the thermoregulation center heats the human body through radiation. Dr. Li said that in hot weather, heat dissipation is undoubtedly the most important work of the thermoregulation center. Most of the heat dissipation of human body is accomplished by radiation, conduction, convection and evaporation, among which sweat evaporation is the most effective way to dissipate heat. "If you sweat, you can achieve the purpose of cooling down." However, in case of high temperature above 35℃, radiation, conduction and convection are useless, and sweat evaporation becomes the only way to dissipate heat. If the ambient humidity increases, the evaporation of sweat will also be blocked. At this time, the human body will feel sultry and sweaty. As the temperature rises, the humidity increases and the environment becomes worse. If the body temperature is not controlled in time, when it reaches above 40℃, there will be symptoms such as headache, dizziness, weak pulse, decreased blood pressure and even loss of consciousness. Why are children prone to fever in summer? Dr. Li said that Chinese medicine believes that summer heat is mainly related to children's physical factors, such as insufficient congenital endowment, acquired spleen and stomach imbalance, developmental malnutrition, or deficiency of both qi and yin due to long-term illness. After entering the summer, they couldn't stand the hot climate and got sick. "The external cause is because of the heat in summer, and the internal cause is closely related to the child's physical factors." Dr. Li said that the child is young and young, weak, and can't stand the summer heat fumigation. However, some children with dysplasia, malnutrition and post-illness disorder lead to deficiency of both qi and yin, and are more prone to this disease. That is to say, "the weather is particularly hot in summer, but the development of children's body temperature regulation center is not perfect and the sweat gland function is insufficient." In the hot summer climate, the normal dynamic balance of heat generation and heat dissipation can not be well maintained, which leads to ineffective regulation, poor perspiration, slow heat dissipation, disordered regulation of water and electrolyte, and finally leads to fever. Children with poor constitution are more likely to get summer heat. Although there are quite a few children with summer fever and dozens of such patients are treated in the hospital every day, why are some children not easy to get summer fever? Dr. Li explained that this has a lot to do with the child's physique. Because when the weather is particularly hot, the moisture on the ground will rise, which will easily affect the human body and cause spleen and stomach disorders. Children with poor physique have poor spleen and stomach, which will inevitably affect digestion and even the metabolic function of the kidney in the long run. Dr. Li said that Chinese medicine divides summer heat into two types: summer heat hurts the lung and stomach and upper excess and lower deficiency (that is, summer heat hurts the lung and stomach and spleen and kidney). " But whether it is true or not, it is because the evil of summer heat invades yin and body fluid. "What's the difference between summer heat and adult heatstroke? Children suffer from heatstroke, which looks very similar to what adults often say. Is it the same or different? " There is still a certain difference between summer fever and adult heatstroke. "Dr. Li said that the summer heat is mainly aimed at children under 3 years old, especially 1-2-year-old infants. Many parents will find that children will have a fever for many days after suffering from summer heat, and their body temperature is relatively high, hovering between 38 C and 40 C. " The symptoms of' three more and one less' are very prominent. "Dr. Li said that he is thirsty, drinking too much, urinating too much, sweating less or not sweating. The body temperature will change with the temperature for 2-3 weeks. Children's skin will become dry and even burning. At this time, the baby is reluctant to eat and has no spirit. Sometimes I get sleepy or thin like an adult. Although heatstroke can occur at all ages, it mostly occurs in adults. What about "three more and one less" Dr. Li said that children suffering from summer heat are generally "three more and one less". How are these symptoms of summer heat formed? Children can't resist the summer heat because the development of the thermoregulatory center is not perfect, so the summer heat invades the lungs and stomach due to deficiency, which makes the body's water regulation disorder and sweat can't be secreted normally. " Once you can't sweat out, you can't get rid of your body heat. "Dr. Li said that after a fever, the body is in a state of high energy consumption, which will consume a lot of water, so that children with fever will sweat less or not." On the other hand, children will feel unusually thirsty because of excessive water intake. "Dr. Li said that due to the hot summer, the kidney's regulation function of water is hindered, and the supplementary water is not easy to absorb, but most of it is discharged from the kidney, resulting in increased urine. At this time, urine is generally clear. Infants and young children under 3 years old are thirsty and want to drink water, but they don't always know how to express themselves, so these children generally cry more. There are also two kinds of "high fever". Parents should also note that children are particularly prone to fever in summer. In addition to heatstroke prevention and cooling, parents should also pay attention to the fact that fever may be these high-risk diseases. First, upper respiratory tract infection "The most common fever in children in summer is upper respiratory tract infection, which is the general term for nose, pharynx, tonsils and throat infections. It is a common disease in childhood. " Dr. Li pointed out that most upper respiratory tract infections are caused by virus infection, and some are caused by bacteria and other pathogens. Children with malnutrition and low immunity are prone to influenza. Second, infectious diseases Dr. Li said that in addition to upper respiratory tract infections, children with sudden high fever in summer should pay special attention to the occurrence of infectious diseases and go to the hospital for diagnosis in time. The most common are intestinal infectious diseases and Japanese encephalitis. 1. Intestinal infectious diseases: acute toxic bacillary dysentery. Dr. Li said that it is mainly caused by unclean diet in children. For example, healthy people's hands touch contaminated utensils, drink raw water contaminated by Shigella, and eat fruits or vegetables where flies with bacteria have stayed, which leads to illness. Typhoid fever in children is not as typical as adult typhoid fever, and the younger you are, the less typical you are. Children, especially infants and young children, have acute onset and obvious poisoning symptoms, and can suddenly start high fever, vomiting and convulsions. Irregular high fever is often accompanied by diarrhea, abdominal distension, rare rose rash and leukocytosis, which is easy to be misdiagnosed. 2. Japanese encephalitis "Summer is the high incidence season of Japanese encephalitis. Japanese encephalitis is an acute infectious disease caused by Japanese encephalitis virus, which is mainly transmitted by mosquito bites. " Dr. Li pointed out. Therefore, in the mosquito breeding season (July to September), children under 10 years old, especially children aged three to six, should be vigilant when they encounter these symptoms.