Sneezing, nasal congestion, and runny nose are the first signs of a cold. All of them are caused by the sudden change of weather or the reduction of clothes. If the body resistance can be, generally not much problem, if the resistance is poor, it is easy to make the germs downstream, fever, cough, etc.; leading to tonsillitis, bronchitis. Even pneumonia. How to avoid colds? The first thing is to pay attention to the weather changes, dress moderately, can not wear more or less than adults, more than adults 1-2 pieces, or than adults wear thicker, or longer clothes. Secondly, it is to minimize the habit of undressing, you can change the thicker clothes into thinner ones, or unbutton the clothes, or a towel across the back, and remove it when the sweat is absorbed. It is best to avoid outdoor activities as much as possible, cold and hot, most like to get sick. Sweat properly rest for a while, it will be good, the clothes off, immediately back to sweat, symptoms.