Caput succedaneum vs. Cephalhematoma

Caput succedaneum is a common and benign condition in which head compression against the cervix impedes venous return. It has the following characteristics
- Apparent usually at birth
- Crosses suture lines
- Reabsorbs within 1-3 days

Cephalhematoma (also spelled as cephalohematoma cephalhaematoma and cephalohaematoma) on the other hand is collection of blood below the periosteum. It has the following characteristics.
- Typically becomes apparent 1-2 days after birth
- It does not cross the suture lines (because it is under the periosteum).
- Takes 3-4 weeks or longer for it to be reabsorbed
- Can lead to jaundice from degradation of the extravasated blood
- Often associtated with birth trauma and a fracture in the newborn's skull bones (most commonly parietal bone)