病因: 1岁以内的婴儿最容易感冒。由于婴儿呼吸道粘膜柔嫩,鼻腔小,鼻道未完全形成,又没有鼻毛,空气与鼻粘膜接触面小、调节温度及阻截异物的能力差,一旦受到细菌或病毒的侵袭,就会使粘膜充血,易发炎肿胀使鼻腔不通,咽喉继之受感染,常出现喉肿、充血,发生呼吸困难。特别是在春秋季,气温变化多端,如衣着不适宜,或穿的太少受寒着凉,或穿的太多出汗也会受凉引起感冒。此外,婴儿常与有呼吸道感染的人接触也会感染。有些婴儿患佝偻病、贫血、营养不良或过度疲劳 Etiology: Infants under 1 year old are most likely to get cold. As the infant respiratory mucosa tender, nasal small, not fully formed nasal passages, and no nose hair, air and nasal mucosal contact surface is small, adjust the temperature and the ability to intercept foreign body is poor, once the invasion by bacteria or viruses, mucous membranes will make congestion, Easily inflamed swollen nasal cavity barrier, the throat followed by infection, often appear laryngeal, congestion, dyspnea. Especially in the spring and autumn, the temperature varies, such as not suitable for clothing, or too cold to wear cold, or too much sweat will cause cold cold. In addition, babies often get in contact with people who have respiratory infections. Some babies suffer from rickets, anemia, malnutrition or fatigue