Keep applying the ice pack for as long as your child will let you, remove it for a few minutes and repeat. Although most children do not like an icepack application, it is useful in preventing the lump from growing. The size of the swelling does not necessarily indicate the severity of a head injury. Even a small head bump can cause a large swelling in children. However if you are concerned about the size of the hematoma on your child’s forehead, do consult with your pediatrician. It is highly unlikely that a concussion can take place with a swelling on the forehead; but if your child starts to experience a loss in memory or confusion immediately after a head injury, you must visit your doctor right away. Other signs and symptoms that warrant medical attention include severe headache, changes in mood and imbalance in walking or standing.