<s>[INST] hi 6 months ago i fell off of my bike and had bad bruising on  my right upper thigh. Since then my bruising is gone away but now i have a lump that is starting to burn. I have applied cold and hott to it and still continues to burn and be sore. Should I see a doctor? [/INST] Welcome to Chat Doctor. 1. History with symptoms suggest that the possible cause could be infective abscess / collection in the subcutaneous plane.2. The next possible cause could be hematoma formation after the trauma.3. In this case it needs to be examined, in case of infective collection in the subcutaneous plane - might need a small incision and Chat Doctor.  4. In case of hematoma also needs removal followed by treatment.5. Small and not complicated cases a simple course of antibiotics with followup will be needed.6. Yes you need to see the doctor. As a remedy do not squeeze, press,scratch the area (as you will complicate in that way), maintain local hygiene and use soft clothing which touch to that location, clean the area with antiseptic liquid. Good luck. Hope I have answered your query,anything to ask do not hesitate to ask.http://doctor.ChatDoctor .com/doctors/ </s>