Tumor production
Tumor, also known as pioneer head, is caused by local edema under the scalp when the child's head is squeezed by the birth canal during delivery. Most of them are most obvious at birth, then gradually become smaller and disappear completely within 36 hours.
Hematoma of skull
Hematoma of skull is caused by the rupture of subperiosteal blood vessels of skull, and the bleeding is limited to periosteum. This is because when giving birth to a child, the top of the skull rubs and squeezes against the mother's pelvis, or because of dystocia, forceps or fetal aspiration are used for midwifery. When a child is born, the head lump is often not obvious. It gradually increases after a few hours or 1 ~ 2 days, and then gradually shrinks. Generally, it is naturally absorbed two weeks to three months after birth.
There is no obvious discomfort.
In the above two cases, most children have no obvious discomfort, and there will be no abnormal situations such as fever, vomiting and convulsions, and no special treatment is needed.