Babies like to bite the lower lip in bed may be due to the sucking instinct is not satisfied, or the environment is noisy, lack of security and other factors, the formation of a bad habit in the long run. Parents should improve the bad habit of biting the lower lip in sleep by supplementing nutrition, ensuring the sleeping environment and giving the baby a sense of security. 1. Appropriate supplemental nutrition: due to the baby sucking instincts can not be satisfied, resulting in physiological sucking in sleep, it is recommended that parents, usually pay more attention to the baby’s own nutrition, eat more high-protein foods, and give calcium and other nutrients in time to replenish. 2. Ensure that the sleep environment: pay attention to the baby’s sleep environment is quiet, comfortable, if the environment is too noisy, so that the baby can not sleep normally will appear to bite the lower lip of the bad habits. 3. Give the baby a sense of security: If the baby sleeps too much to turn the body, it is recommended that parents can gently pat the baby’s back, and give the baby a sense of security in a timely manner, which can alleviate the baby’s bad habit of biting the lower lip to seek a sense of security. Babies like to bite the lower lip in bed, there may also be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment. All of the above medications should be used under the guidance of a doctor.