This patient has a soft tissue contusion involving the quadriceps muscle. In acute care setting, the patient should be advised rest, ice, compression, and elevation or RICE. Might as well, an x-ray should be done to rule out potential fractures and dislocations. Possibly, casting may be done. Medications like pain relievers may be given to soothe the pain. Upon follow-up, range of motion should be assessed and repeat x-ray may be done. Removal of casts may be done also. Continue RICE.