Dreams involving physical injury, such as being hit in the head, can often symbolize feelings of vulnerability, conflict, or unexpected challenges in your waking life. The fact that you were in a room with others might suggest that these feelings are related to your social interactions or relationships.
Bleeding and bruising in a dream can represent emotional pain or distress. It may indicate that you feel hurt by something someone said or did, or perhaps you are dealing with feelings of inadequacy or criticism. A concussion could symbolize confusion or a sense of being overwhelmed by a situation.
Consider reflecting on your current relationships and any recent events that might have caused you to feel attacked or hurt. It may be beneficial to address these feelings openly, whether through communication with others or through self-reflection. Taking time to heal from emotional wounds is just as important as addressing physical ones.