The absence of fontanel in newborns may be normal, but it may also be pathologic. 1. Physiological reasons: the baby’s head passes through the birth canal during delivery, and the bones slightly overlap at birth, which may cause the fontanel to be inconspicuous. Usually, the overlap of the skull bones gradually disappears in 2-3 months after birth, and the fontanel will be more obvious, which is a normal physiological phenomenon. 2. Pathological reasons: newborns without fontanel may also be due to premature closure of the fontanel resulting in microcephaly, the child’s forehead and occipital flat, physical development is obviously abnormal, mental development is significantly delayed, and some children may appear limb stiffness, tics, or hand and foot movement, or even paralysis, seriously affecting the development of the baby’s central nervous system. If you find a newborn without fontanel, it is recommended that parents should take their babies to the hospital in time to find out the cause of the disease and symptomatic treatment under the guidance of the doctor.