I understand your concern. This is head injury or trauma. Head trauma resulting from play or sporting events is a common concern for parents, but few bumps on the head of this nature result in serious injury. The forehead and scalp have an abundant blood supply, and injury to these areas often results in bleeding under the skin. When the bleeding is restricted to one area, it causes bruising and swelling. Doctors refer to this as a hematoma. Occasionally, a blow to the head may be severe enough to cause bleeding in or around the brain. This type of bleeding can cause an intracranial hematoma, a serious condition that puts pressure on the brain. See a doctor within one to two days of a significant head injury with ongoing symptoms, even if emergency care isn t required. Seek emergency medical attention if you experiences Unconsciousness, confusion or disorientation immediately after a head injury or after some time has passed. You do not have to worry because squishy egg will be finished and resolved with the passage of time due to good circulation of blood. Please go to physician and he may advice you CT scan of head to rule out serious causes as we always have to be on safe side and patient safety is our top priority