Summer is here again, the electric fan, air conditioning on the scene, in the hot summer, air conditioning, electric fan is the protagonist of life, we can not leave them almost a moment. Air conditioning, electric fans not only bring us comfort, cool, but also let us enjoy the torture of illness, of course, these are improper use of air conditioning, electric fans caused by. Improper use of electric fans, air conditioning, is to get electric fan disease, air conditioning disease. Electric fan disease, air conditioning disease is specifically what the disease, now the medical has not been officially named, but we should also know that this is a disease similar to rheumatism. Both electric fans and air conditioners can bring us cool air, especially electric fans, which make the static air flow faster and evaporate away the heat on the surface of our bodies, making us feel cooler. But too cold stimulation, so that the human skin temperature is different, especially from the high temperature environment into a cooler environment, the temperature difference and sudden changes in temperature, the human phytonotropic system is difficult to adapt, especially fixed in one direction or a long time to blow, so that people are wind-blown body surface skin blood vessels are contracted, sweat evaporates quickly, forming a stimulation area, and not blowing to the wind surface skin of the Temperature is still very high, resulting in the body surface skin blood vessels are diastolic state, sweat evaporates very slowly, so that the body surface wet difference appears larger, a long time, then, will make the local discomfort is obvious, in the long run, is easy to induce physical disease, but can not determine whether it is rheumatism. But if this direct blowing part is the knee, it is possible to induce rheumatism, this is because the knee joint is more susceptible to external adverse factors than other parts of the body, thus inducing rheumatism. The rheumatism causes the influence of environmental factors, the wind of the electric fan is also a natural wind, but stronger, long time blowing directly on the knee, which is the knee joint can not withstand. This causes rheumatoid arthritis of the knee, which is entirely possible. In the future, you must pay attention to the use of electric fans, not for a long time, and not for a long time to blow a part, especially not directly blowing the knee.