Sometimes, symptoms of brain injury will appear right away, while in other cases they will appear slowly over the course several hours. An individual with mild traumatic brain injury—e.g., a concussion—may remain conscious or pass out briefly after suffering the trauma, and may suffer from headaches, blurred vision, dizziness, memory problems, confusion and lightheadedness.
Cases of moderate to severe brain injury require immediate medical attention. Symptoms of serious TBI include: unequal pupil size, convulsions, skull fracture, personality changes, loss of consciousness or confusion, drowsiness, slow breathing, lack or coordination or clumsiness, vomiting, severe headache, impaired sensations (e.g., hearing, smell, taste or touch) and symptoms that seems to improve but suddenly worsen.
Children’s symptoms of serious TBI, in addition to the symptoms listed above for adults, refusing to nurse or eat, and not stopping crying. Children who have suffered a blow to the head and have any of these symptoms should be taken to the emergency room.