Hello Thank you for posting at HCM. From the looks of your description, a painful lump on head after one week of an accident, causing fever, this looks like a post trauma hematoma. We need to do a physical examination of the lump ( you can contact a physician for this) and confirm if its fluctuating and whether transillumination is positive or negative. Also whether the pain increases on pressure, if its decreasing in size over the time should also be considered. For the time being for pain relief, you can get Tab Amzesik MR 1-0-1 x 5 days, Volkflam Gel O/M 1-1-1-1 x 4 days at the site, and visit a doc in the meantime if the swelling doesn t recede on its own. urgency of contacting the physician depends on whether she is feeling week and the distance of the lump from eyes. I wish a very good health to your sister. Feel free to ask us any other query you have Thank you