<s>[INST] A week and a day ago, I got pushed to the ground and received a humungous bump on the top-left side of my head. That night it swelled down a lot, but the next day I almost fainted for the first time in my life. Since that day, I still have a bump, I have a great lack of focus, and sometimes feel a mild pain or numb/cold feeling in the spot of the bump. Is this a serious head injury? [/INST] Hi, dearI have gone through your question. I can understand your concern.  You have history of head injury.  You external bump is due to hematoma formation. You should take analgesic plus anti inflammatory drugs like ibuprofen.  You should also go for ctscan once to rule out internal head injury.  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. </s>