Babies always bite the lower lip, may be habitual action, but also does not rule out pathological factors such as the baby has lipitis and other uncomfortable symptoms, can be relieved by helping the baby to correct the habit, the use of medication, if necessary. Babies may gradually form bad habits due to habitual movements. In this case, parents should try to distract the baby’s attention with sounds and toys that interest the baby, or give the baby something to eat, so that the baby forgets the action of biting the lower lip, and after a period of time the baby will gradually correct the bad habits. If the baby suffers from lipitis, lips localized dry and cracked discomfort, may also lead to the father always bite the lower lip, parents can apply baby special lip balm, glycerin to the baby when the baby sleeps, so as to play a role in moisturizing the lips, to avoid the wind blowing cold stimulation, serious can follow the doctor’s advice to use tretinoin cream, such as topical application. If through the above methods, the baby’s symptoms did not improve, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.