The baby’s soft scalp may be caused by the unclosed fontanel, or it may be caused by vitamin D deficiency rickets, depressed skull fracture and so on. 1. Unclosed fontanel: If the fontanel is not closed after the baby is born, the scalp will be soft when palpating the local scalp. This is mostly considered to be due to incomplete development of the skull, which is a normal physiological phenomenon and does not require treatment. 2. Vitamin D deficiency rickets: mainly caused by insufficient vitamin D supplementation in food and insufficient sunlight. Patients will have softening of the skull, and there will be a ping-pong ball-like feeling when pressing the parietal bone with hands. If the baby has vitamin D deficiency rickets, there will be soft scalp. 3. Cranial depression fracture: Cranial depression fracture may be caused by uneven pressure on the fetal skull due to the use of fetal head attractor and forceps during delivery. Patients with depressed skull fracture will have a tender scalp on palpation of the scalp. Baby scalp soft, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.