Before the baby to teething have the following symptoms: 1, the milk teeth embryo constantly moving to the occlusal plane, resulting in local mucous membrane white, sometimes bacterial infections, swelling, like to gnaw on the fingers or nipples, etc. 2, the crown of the milk molar teeth is larger in area, the eruption of a longer period of time, often caused by the local gums, red, swollen, pain, pain, resulting in the baby’s emotional irritability, crying, sometimes refusing to eat, and can occur such as elevated body temperature phenomenon. 3, the stimulation of teething will lead to parotid gland, submandibular gland, sublingual gland, etc., secretion of a large amount of mucus, due to the nervous system is not yet perfect, can not control the swallowing action, there will be more saliva, overflow of the corner of the mouth, the formation of rashes around the mouth phenomenon.