Three-month-old babies biting the lower lip is considered to be a normal physiological phenomenon, may also be caused by the lack of micronutrients.
1. Normal physiological phenomenon, infants in the process of growth and development may exist in the oral sex period, it is easier to suck the finger, biting the lower lip symptoms, at the same time, if the baby is more insecure, may also appear such symptoms.
2. Lack of trace elements, if the baby body lacks trace elements, such as calcium, iron, zinc, etc., may lead to the baby’s nervous system excitability, so there will be lower lip symptoms.
Usually need to observe the baby’s physical condition, to determine whether there is a variety of abnormal reactions. If there is any obvious abnormality, it is recommended to consult a doctor as soon as possible.