Children easily catch cold, this condition is common in low resistance, immunity is not strong enough, the body’s physique is very poor, and the main factor is malnutrition, unbalanced diet, such as the lack of a variety of vitamins, trace elements, more representative is the lack of calcium, zinc, iron. At this time, it is recommended that children should develop good eating habits and not be partial or picky eaters, so as not to cause nutritional imbalance. If necessary, have a regular physical examination to test the blood routine, trace elements, bone density levels, and even check the level of immunoglobulin in the plasma. The diet should be balanced and nutritious, with appropriate supplements of calcium, zinc, and cod liver oil, and the feeding plan should be adjusted at any time for follow-up.