The most common clinical symptoms are: fever, cough, headache, vomiting, diarrhea, and abdominal pain. These are only symptoms, not diseases; some symptoms are protective reactions to the child’s body, not a bad thing. To clarify the cause of the disease is the solution, not “headache, foot pain”, is the best policy. 1, fever: fever is a defense response of the body to disease-causing factors. It is the external manifestation of the struggle between good and evil. It is the body’s autoimmune response. Generally fever is less than 38.5 degrees, below is safe. The temperature of fever is not directly related to the severity of the disease; it depends on the child’s mental state and general condition. It depends on the child’s mental state, general condition, and the accompanying symptoms. In general, the fever of infection is the process of antibody production by the body; for example, it is more feverish after vaccination. In case of high fever, greater than 39 degrees, you should loosen the clothes and air, take warm water baths to disperse the temperature, drink more water and eat lightly, and then follow the medical treatment. 2. Cough: Coughing is a protective emission by the body to eliminate airway secretions or airway foreign bodies. Different diseases cough in different ways and the nature of coughing sputum varies. In many cases coughing is not a bad thing, it is a reaction to exclude foreign body germs. When coughing, drink more water, fresh air, appropriate temperature and humidity, 18-22 degrees, 55%-65% humidity, and look for the cause of the disease for systematic treatment. 3.Headache: Headache is a neurological symptom performance, and it is difficult to distinguish from dizziness in children, which can be seen as intracerebral and extracerebral lesions; ophthalmogenic, rhinogenic, otogenic; fatigue, mood swings can cause. Therefore, it depends on the nature of the headache, its location, duration, and the effects of medication and rest. Make sure the cause is organic, functional or psychogenic. Do not blindly use pain relief treatment. 4.Vomiting: Vomiting is reflexive vomiting of stomach contents, which on the one hand can remove harmful substances from the digestive tract and protect the body; on the other hand, violent vomiting can lead to water-electrolyte imbalance and nutritional disorders and endanger the body. When vomiting, prevent asphyxiation, eat less and more meals, liquid and easily digestible diet; observe the nature of vomiting, nature, smell, accompanying symptoms, etc., and treat the symptoms for the right reasons. 5. Diarrhea: Diarrhea is a change in the number, character and quantity of stools, which can be caused by infectious, non-infectious and climatic factors. Sometimes it is a manifestation of the elimination of viruses and bacteria from the intestinal tract, and can also be stimulated by cold and heat in response to increased intestinal peristalsis. To see whether the stool has blood, mucus, pus; frothy, soap-like, jam-like, dilute water-like performance; whether there is little urine, poor spirit, dehydration and other complications, in order to develop a treatment plan. 6, abdominal pain: abdominal pain is very common in pediatric clinics, seen in pediatric internal medicine gastrointestinal inflammatory diseases, but also in pediatric surgery appendicitis, intussusception, peritonitis and other diseases, more common pediatric gastrointestinal nerve disorders, intestinal spasm and other disease manifestations. It depends on whether the abdominal pain manifestation is acute, chronic, paroxysmal manifestation; what are the complicating symptoms? What is the relationship between abdominal pain and body position? Be sure to find the cause of the disease, and never use painkillers in a hurry. Otherwise! Misdiagnosis, mis-treatment! Delay the disease!