The most common causes of soft bumps on the head of newborns at birth are as follows: a. Scalp edema, also known as birth tumor, pioneer head, this is due to the pressure on the circulation of the scalp during delivery, vascular permeability changes and lymphatic reflux obstruction caused by subcutaneous edema, the mass is not clear boundaries, is not limited by the bony suture, disappeared in the postnatal period of 2-3 days, scalp edema does not require special treatment. Scalp hematoma is caused by rupture of subperiosteal blood vessels due to birth injury, blood accumulates under the periosteum, due to fetal malposition, cephalopelvic disproportion, fetal head attraction, or forceps delivery, hematoma does not require special treatment for small hematomas, large hematomas with more than moderate hyperbilirubinemia, can be carried out with hematoma aspiration and compression bandage, and daily injections of vitamin K1 to prevent the aggravation of hemorrhage.