Symptoms of an infant concussion can include soft tissue damage, crying, nausea and vomiting, confusion, and lethargy. But symptoms can vary with different degrees of concussion. 1. After a concussion has occurred, it can show slight soft tissue damage and close observation is recommended. If there is crying, nausea and vomiting, etc., the duration is short and bed rest is sufficient. 2. If the concussion is severe, a persistent headache may occur and vomiting may be evident. It may also be accompanied by other abnormal symptoms, such as poor consciousness and drowsiness. If the symptoms worsen, it is necessary to go to the hospital in time for cranial CT examination to exclude the possibility of intracranial hemorrhage. Since the brain of infants is not very well developed, the injury may be serious when they are shocked, and they need to go to the hospital in time to find out the cause and treat it.