For the bump caused by the collision, first look at whether you are conscious, whether you are unconscious and vomiting. If yes, you should seek medical attention immediately and do CT examination to rule out brain tissue damage;

If not, it is generally not a big problem, but if there is trauma, it is necessary to debride and suture. If there is no trauma, it may be a hematoma. You can wrap the boiled eggs in cloth and iron them. You can also use a bandage to stop the bleeding, then use ice to compress the hematoma, and then use medicine or tincture to reduce the swelling tomorrow. After observation, if you feel unwell, see a doctor at any time.