There are many reasons why children often have colds and coughs, as follows: 1. Consider the immune function is not sound, children under 3 years of age from the mother’s immune protein gradually disappeared, and the body’s resistance is not fully formed, so it is easy to be attacked by viruses or bacteria, thus recurring colds, which is normal, you can increase the child’s body resistance to disease through diet and related exercise. 2, there may also be a lack of trace elements or anemia and other problems caused, to take the child to the hospital to do the relevant examination, timely replenishment of the child’s body lack of iron, calcium, zinc and other trace elements, can help relieve the cold and fever; 3, many children after the cold treatment is not timely or delayed for a long time, there will also be recurring episodes of the situation.