One year old baby love to bite, may be the performance of dental development, may also be the lack of certain trace elements, psychological disorders and other factors. 1. Dental development: baby teeth in the development of itchy gums, teeth, soreness and other symptoms, usually want to bite things, at this stage will also appear to bite the performance, and will be accompanied by drooling, body fever and other symptoms. 2. Lack of certain trace factors: such as lack of zinc, lack of iron, etc., if not supplemented in time, the habit of biting may occur. 3. Psychological disorders: mainly due to excessive parental care, or the existence of domestic abuse situations, the child is extremely insecure or over-indulgent, it is possible to develop a bad psychology, which will cause the love of biting like. If a one-year-old baby often appears to love biting phenomenon, it is recommended to go to the hospital as soon as possible to find the cause.