A goose egg is essentially just a bruise on the forehead. Whether it’s from a fall, a collision on the soccer field, a car accident, or other high-impact contact, trauma is a leading cause of hematomas. The following are some of the more common causes of bumps on the forehead. Knowing the cause and whether it represents a potential medical emergency should help you make an informed health care decision. These bumps can form for a variety of reasons. Most bumps that appear on the forehead are benign if there are no other serious symptoms present. It may not be an emergency, but you’ll want to know what the bump is and how likely it is to remain. If there are no symptoms or the symptoms are minor (such as a mild headache), make an appointment to have that goose egg examined by a doctor. You’re better off taking your child to the emergency room or calling 911 than wondering about the nature of the injury. If any of these symptoms don’t appear right away - but do develop a day or two after a head injury - see a doctor immediately. If the pupils are a different size or one eye doesn’t move in coordination with the other, the injury needs immediate evaluation. You should also look at your child’s eyes after a head injury.A headache that doesn’t go away and nausea, with or without vomiting, are two other indications that a head injury requires emergency attention.Likewise, if your child starts moving in an abnormal way, appearing to have trouble with balance and coordination, get to a doctor immediately.If your child doesn’t seem as alert as usual and doesn’t respond to you and your questions, consider these signs to mean that an emergency room visit is necessary.Sudden sleepiness or changes in mood and personality could be a sign of a more serious injury.If you’re caring for a child with a forehead hematoma, you should closely watch their condition: Even if the loss of consciousness is for a few seconds, you should seek immediate medical attention. Of course, a blow to the head that causes you or your child to lose consciousness should always be treated as a medical emergency. You need to pay attention to your other symptoms. A forehead bump alone isn’t enough to determine whether or not you need medical attention.