Babies often catch colds, most of the consideration and physiological structure characteristics, low immunity, improper parental care, micronutrient and vitamin deficiencies, etc., if necessary, go to the hospital for examination, to clarify the cause of the treatment. 1, physiological structure characteristics: the baby’s nasal cavity, the respiratory tract is relatively short, and the nasal cavity is no nasal hairs, mucous membranes, mucous membrane tender, mucous glands, mucous membrane gland secretion is insufficient, bacteria, viruses easy to invasion, resulting in colds, babies can be relieved when they grow up! 2, low immunity: the baby’s immune function is not fully developed, autoantibodies have not been fully formed, easy to suffer from pathogen attacks. With the growth of age, it can be gradually improved, can also be on time to receive influenza vaccine; 3, improper parental care: parents failed to timely add or subtract clothing according to the weather changes, and after sweating failed to dry in a timely manner, etc. can lead to cold, causing colds. Parents need to strengthen the baby’s care, pay attention to warmth, strengthen exercise, improve physical fitness, ensure adequate sleep, rest; 4, nutrient deficiencies: in particular, the lack of vitamin D, vitamin A, zinc, iron and other elements, will affect the baby’s body immunity. Need to improve the micronutrient examination, in accordance with the medical advice to be supplemented by the lack of elements, parents need to ensure that the baby nutritional balance, eat more food rich in high protein and vitamins, such as milk, apples, etc.; 5, other: the baby often colds need to be clear whether there are some underlying diseases caused by immunity caused by colds.