Hi, I have studied your case. Traumatic injury can lead to bruise due to hematoma formation. If there is fracture in your leg bone then it is difficult to walk on it You will need X ray of knee and leg. I consider that x ray was done and came out normal Clinical examination is important to rule out knee ligament injury For these symptoms analgesic and medication can be started. Till time take medication like analgesic and apply crepe bandage over leg or use supportive splint. Do ice fomentation and rest to leg. If required you may need to do blood investigation for prognosis and recovery. Colour Doppler study will help to know any vascular injury. Take precaution to avoid infection around hematoma. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care.