<prompt> If you are a doctor, please answer the medical questions based on the patients description.I got into a car crash about two weeks ago and hit my shin. I was in a splint for a few days and crutches for about four days. I now have a large ish bump on the same spot where I injured it in the crash. It is very painful. And slightly swollen. Any ideas about why?  <response>: Hello dear, The lump formation after injury is due to accumulation of fluid blood, and it is called Hematoma. The blood cells accumulated are eventually broken down and absorbed in the body. But this is a slow process takes times to disappear completely. Till that time, symptomatic relief is obtained by ice compression, adequate rest analgesic preparation like Diclofenac Serratiopeptidase. If symptoms still persist, kindly consult an Orthopedic for proper clinical examination.X-ray of the affected leg will be helpful to rule out any fracture or other pathological causes. Wishing you a Good Health. Take care. 