What happens after you take a blow to the head and the bump has moved around?

After a blow to the head, if a bump appears and moves around, it may indicate the presence of a hematoma or swelling under the skin. This could be due to blood or fluid accumulation as a result of trauma. While some bumps are benign and may resolve on their own, it's essential to monitor for symptoms like headaches, dizziness, or confusion, as they could indicate a more serious injury. If concerning symptoms arise, seeking medical attention is crucial for proper evaluation and treatment.