Dog Vomiting After Head Injury. Also known as traumatic brain injury (tbi), this is an occurrence that happens quite commonly due to incidents such as vehicular accidents or falls. But any one of us is at risk for a concussion, including our canine friends.
Only a veterinarian will be able to verify internal injuries. Without external signs of trauma, eg lacerations or swelling on his head, a single episode of vomiting without any other symptoms is probably ok, seeing as he didn't lose consciousness at the time. Head injury is a common reason for children to present to accident and emergency (a&e) departments.