Colds are a common problem for children during winter and spring, mostly caused by viral infections. A cold may seem like a minor illness, but it can cause many complications and may even be a precursor to other diseases, of which viral myocarditis is one of the most common. Some data show that the incidence of viral myocarditis in children has been on the rise in recent years. Viral myocarditis, which usually develops several days or 2 to 3 weeks after a child has a cold, has both mild and severe symptoms. The lighter symptoms are not obvious, plus the child does not know and will not tell, often easily overlooked and missed or misdiagnosed; the heavier ones can appear in a short period of time heart enlargement, acute heart failure or cardiogenic shock, and even sudden death. There are certain precursors of viral myocarditis due to cold, which can be detected by parents with careful observation. First, look at the color of the face. As the virus invades the heart muscle, affecting the function of the heart, so that the body is hypoxic, although the child’s fever has receded, but the face is always slow, pale, blue lips; second is to look at the color. Usually the child is very good spirit, after the cold spirit depression, “wilting”, always called dizzy and weak, move a little shortness of breath, chest tightness, panic; third is to observe the pulse. Quiet or sleep, the child’s pulse is less than 60 times per minute or more than 120 times, or a few jumps after a longer gap, this too slow, too fast or irregular beating pulse are abnormal. The key to viral myocarditis is prevention. The child must pay attention to its rest after the cold, to reduce the activity, not to carry out strenuous exercise, once the above-mentioned “cold” symptoms can not explain the changes, should promptly go to the hospital for examination, for early diagnosis, early treatment. Although there is no special treatment for viral myocarditis, the earlier it is detected and controlled, the less damage to the heart muscle and the better the prognosis. Otherwise, the prognosis will be poor due to delayed treatment or if it becomes chronic. In addition, parents should insist on taking their children for suitable sports and exercise, and children should have a regular daily life, pay attention to reasonable nutrition, drink more water, and ensure sufficient sleep to enhance their physical fitness and ability to resist diseases, so that they can grow up healthy and happy.