Hi, dear I have gone through your question. I can understand your concern. You have history of trauma. so you may have hematoma formation due to extravasation of blood. You should go for x ray of that area to rule out any bony injury or fractures. You should take analgesic and anti inflammatory drugs ti reduce pain and swelling. Hot water compression is also helpful. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using health care magic. Wish you a very good health.