<s>[INST] Hi I hit my head really hard falling down stairs, had a massive lump went to hospital but left as soon as I could. I remember thinking I felt fine at the time and wanted out of there but that it really hurt. I dont remember much after or before I hit. Woke up the next morning with a sore jaw on the same side I hit (hit the back of my head) and a sore tailbone. Had headaches for a few days after and still had a massive lump that bruised half of my head. Its now 3 weeks later and I cant wear my hair up or my head hurts. Still a few lumps on my head that are cushion-y. Should I got back to the doctor? [/INST] Welcome to Chat Doctor .1. Its hematoma after a trauma, which is seen as a bulge in your case, it will resolve on its own in 2 -3 weeks.2. But if it's not resolving still having pain - I can think in terms of infective etiology.3. Its better you see your treating doctor / GP, let the area get examined, if there is any pus collection or infective features seen.4. A small incision to remove the pus collection, and good Chat Doctor. 5. Yes better you see your doctor. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. </s>