What Is The Remedy For Leg Pain After An Injury?

Hi, I am 24 year's old male, I got a problem with Right Leg That is A stone was hit to it with Strongly but No fracture has happend, It took place nearly one and half year. Now a days the right leg getting some very very little pain and sometimes streching the leg from body . I think is it septic will occur that is it will eat the cells .

Can you suggestion me or what kind of treatment should be taken care?